I think I've found a solution to the 3-SLI 3/8" tube kink problem:



No tube kinking! Heck, not even tubes are necessary! Just two of these adapters for a 3-sli setup.

Some info from the german website (via google translate):

"The variable SLI Verbindunsnippel combines two graphics card cooler, in a system in SLI mode. The special at this point is that it is variable by about 12mm in length is adjustable. Therefore, this nipple with graphics cards from different manufacturers can be used. The SLI connection nipples are available in 3 lengths: Art for 64033 slot 1, Article 2 slot for 64034 and 64035 for Article 3 slot motherboards.

Technical data:
A direct connector between 2 graphics cards.
Threads: G1 / 4 inch material: nickel-plated brass
Distance between the coolers: 18.9 to 30.3 mm
Suitable for motherboards with 1 slot gap between the two graphics cards.
Fits crossfire graphics card cooler by example Ek Water Blocks, Koolance, DangerDen"

Verbindunsnippel... don't you just love german?