My center inlet hold down for Socket 7 using the clips.
 

As there are a few boards out there that do not have the mounting holes (some duelies) or have critical parts to close to the holes to use, I started developing a hold down device. At first it was simple because I never used the middle inlet but once the middle inlet was in use it became a real challenge to make it work. It still is not perfect but here is what I have so far.
http://www.customcooledpc.com/soc7hlddwn/001.JPG
http://www.customcooledpc.com/soc7hlddwn/002.JPG
http://www.customcooledpc.com/soc7hlddwn/003.JPG

The parts made I made with the lazer cutter and rotory engraver at work:
http://www.customcooledpc.com/soc7hlddwn/004.JPG

It actually hold real tight! The biggest problem is getting it to set level on the core. The two screws make it a little difficult but i just don't know any better way yet. I seen the one Danger Den uses with the spring in the middle but I just don't think it would hold tight enough for my liking anyway.

It isn't perfect but it is better than not using water cooling because of no way to attach it half way decent. :D

Any comments on improvements are welcome!

What kind of clamping pressure are you able to apply with it?

I was using a dead Epox 8K7a and a Dead Duron 600 and was able to crack the core so.... enough. :D I used a piece of 1/4" Acrylic and tapped the holes. It bent the whole device but it worked. I can pick the board up by the water block and swing it around without it moving. Don't recommend doing that with good parts though! :evilaugh:

Very nice work there.

One gripe I had with my Maze1c's was trying to install hose clamps onto the centre barb. In the end I used two zipties to keep the tubing on there tight.

Why not use four screws?, to even out the pressure...

Isn't really room for 4 screws. At least not on the block I designed it around which is my own Lemon Block. Might be able to put two side by side but I am not seeing how that will help as the pressure is in the center as it is where it needs to be. The block came off with a perfect imprint of the core so I am not to worried about more screwes but I would like to replace the plexy part with a aluminum one so it doesn't bend as much.