Posting as I'm in the same boat.
Took it out for its first game on Sunday, I planned to run 0.36s but they were just too much for the standard hop.
0.28s weren't much better either.
I've got the combat union hop unit now installed with a maple leaf 60° bucking & nub, just have to wait to be able to test it now.
I noticed that the fps can drop massively depending on how much hop is added; at full hop it has dropped to under 200fps, from around 450 on none.