I have no doubt that the Foundation has more flex than the V2. I'm going to switch to a Magnitude or Foundation I think. What's another block in my collection? LOLI’ve been thinking the Foundation may have different properties although they are the exact same cold plate. The Sig V2 is a massive chunk of nickel plated brass, all one piece with a cold plate screwed in the bottom where the foundation has an aluminum frame, a chunk of acrylic bolted to that and the cold plate screwed to the bottom. I’m thinking it may have more give when you crank it down than the Sig V2 which may not be a bad thing allowing the cold plate to mold to the IHS a little better. Nothing proven. Just a thought I had reflecting on when Thrash and I were going head to head with the two blocks. I only wish he had waited a bit and finished testing as is out of the box before breaking out the cutting torch and side grinder.
I don't think the block gets that hot to make expansion/contraction that much of an issue. The issue, IMO, lies in the springless mount. It is VERY easy to apply uneven pressure to the 4 corners when screwing down the block. Either having springs or "stops" on the posts to ensure even tightening would make more sense.With my EVO Supremacy, I just tightened it down until the thumbscrews hit the "stops". Even pressure every time.I mean it's a long shot and I have no idea how much brass expands and contracts but is it possible that it is just becoming loose from expansion and contraction? lol