No Damage and I must have had this leak for at least a week before I found it.
 
Click on Image twice for a Larger View.
Note: No Coolant leak inside the X99 PCIe Slot, only the Outside of the Slot.

 
 
A Great Motherboard is all I can say.
 
This is the Rig

Sajin
Lucky.

This may be true and it did not hurt have a Good Electrical Conductivity (µS/cm) 2500 Coolant.
Note: Conductivity (µS/cm) Lower is Better

GTXJackBauer
Wow.  Very lucky.
 
Non-conductive coolant is a gimmick since once the coolant touches a surface or air and picks up some debris, it become's conductive.

Not this stuff; I poured some in error into my Power Supply and it Did Not Short Out the Power Supply, it did take 3 days to dry though.
Koolance 705 Liquid Coolant, Electrically Insulative, Colorless, 700ml (24 fl oz)   SKU: LIQ-705CL-B
Koolance 705 series coolant is used by many industries requiring a low conductivity (0.36 microSiemens per centimeter), low-toxicity, reliable coolant with corrosion and biological inhibitors.

Cringe. That's the kind of image that scares the poop out of me. I may have to pick up some of that coolant BCavnaugh used for when I move my system over to my new case.

sethleigh
Cringe. That's the kind of image that scares the poop out of me. I may have to pick up some of that coolant BCavnaugh used for when I move my system over to my new case.

I use this for two reasons other then I have to use only Koolance Coolants and Blue because it will show leaks before they get out of hand.
$14.99 Koolance 702 Liquid Coolant, High-Performance, UV Blue, 700ml (24 fl oz)   SKU: LIQ-702BU-B

What are the black 90* unions, I like them? Really like the QD's, I have yet to use the new style that are like an air chuck. I have been using the old school ones that twist/lock. Great set-up, makes for easier GPU removal!!  I'm glad the board was ok, doesn't always work like that. Is your MB set up horizontal?

wow so lucky!
 
 

Well decided to share my 'fountain experiment'. In May when I finally finished refit (after like decillion hurdles along the way) I had a sort of leak during final bleeding but not on fittings. I was not quick enough to seal top plug on radiator (yeah, stupid me) and I seriously misjudged speed of the fluid (2xD5s). It splashed green fluid like mad. First time for everything they say.
 
It swamped my RAID card and a bit of VGA. But it's not that bad. Because of reverse-atx setup it didn't affected the board at all - VGA deflected fluid away from slots. After that I spend about hour with paper towels and hair dryer. Turned it on and rest is history as they say. LOL Now I'm giggling like an idiot when thinking about that, but it was quite an adventure.
 
For SLI connectors (or in my case extenders) I'm using Bitspower Aquapipes. These are quite expensive, but unbelievably well made and rock solid. I had very bad experience with older Aquatuning/Phobya/Alphacool models.

bcavnaugh
 
Well I will say that if EVGA Provided SLI Water Bridges this would not of Happened.
It has been an Hydro Copper Issue for a very long time. Hint Hint
 

You make it sound like its EVGA's fault your rig leaked?  Obviously something went wrong but I don't think you'll be honest with us since you would have told us already but placed the blame on someone else.  Its your job to maintain your loop.  

To each their own I guess but color fluids are a huge no-no and they stain.  I don't like people giving others bad information that they should buy-buy-buy colored fluids because they're great or they must get koolance.  Many fluids out there.  Not all pre-mixed fluids (Clear) are bad either.

Vlada011
You can use now Arctic Cleaner set and easy with cotton buds, little by little if you want to remove traces of coolant.
 

Their are no stains and clean up is easy with distilled water and some Q-Tips.
I have yet to see any staining from the Blue coolant I use from Koolance.

I don't think they'll make a universal SLI waterbridge for several different configured blocks.  That's what the water cooling Mfgers are for.  A simple bitspower SLI fittings between the GPUs would have worked fine and should be looked at as a viable option.  
 
Looking at your images, you have way too many connections going on.  Think of each connections as a leak point.  The simpler the routing the better.
 
Constructive criticism here, not bashing you BC. 

Thanks for taking the time and explaining.  That sucks that your o-ring gave away and surprised it went that short.  I use bitspower all around for about 5 years now with no issue (knocks on wood).  I've only changed a single fittings o-rings once.

Brand New Swiftech G¼ Male-Male Lok-Seal Short Extension Fitting (11-18mm Range) - Black

 

Looks like a bad batch to me if you threw away some new fittings and still used the others which lead to your leak.  That's really unfortunate and you're very lucky it didn't completely destroy your rig.  
 
I looked around on bitspower and the only thing that came close to that size was some adapters where you use acrylic tubing in between the set of fittings.  I'm sure that would be a pain.  I understand it can be frustrating since they don't sell a waterbridge for multi GPU setups but I believe Swiftech does sell them but not for quad.
 
I checked to see which GPU's blocks you have in searching for a waterbridge for you but had my head scratching because both of your images have different GPU blocks.  The first one looks to me like they are EK WBs so I would check with them for a water bridge as the second image of GPUs are Swiftech waterblocks.

GTXJackBauer
Looks like a bad batch to me if you threw away some new fittings and still used the others which lead to your leak.  That's really unfortunate and you're very lucky it didn't completely destroy your rig.  
 
I looked around on bitspower and the only thing that came close to that size was some adapters where you use acrylic tubing in between the set of fittings.  I'm sure that would be a pain.  I understand it can be frustrating since they don't sell a waterbridge for multi GPU setups but I believe Swiftech does sell them but not for quad.
 
I checked to see which GPU's blocks you have in searching for a waterbridge for you but had my head scratching because both of your images have different GPU blocks.  The first one looks to me like they are EK WBs so I would check with them for a water bridge as the second image of GPUs are Swiftech waterblocks.

EK and Swiftech do not make one for the Custom Hydro Copper Water Blocks even though they both made the Water Blocks for EVGA. That is why I hinted to EVGA about having some make.
 
The Image with 3 Cards are made by Swiftech and my 4-Way Rig are the EK Water Blocks made for EVGA, they are both the same head size.
The one new item that the EK makes now have the new ports on the Top, none of the Swiftech have them.
My Titans have the water blocks from Swiftech as well as do my GTX 690 and even my GTX 680 Classified Cards.
http://www.swiftech.com/slicrossfirebridge.aspx
 
Even Koolance make the SLI Bridges but only for their Water Blocks.
 $52.49 Video Bridge Connector, 4-Cards   SKU: CNT-VDB