I started this fitment question with gens ace 5000s a month ago. I bought a new non-carbon 4.1 shock tower and the gens ace 5000 (25mm height) now fits. I think I was using an old b4.0 non-carbon tower previously. There is very little room to move the battery forward or back though. Maybe half a foam block width will fit now. I'm using the carbon strap with thumbscrews. Hopefully this information helps someone else!