Man just when I thought I got it all figured out, I learned something new.
I called agristore just now and the lady who answered was super helpful. Yea float definitely wont work, though I can remove the check valve by unscrewing the top bar/ connections to cylinder on each end, then put the hose directly to the cylinder.
Thinking through it, there are some situations where you want float and some where you don't...for box blade work I think a lot of time you want it set and not drift. For example, if you want to slowly drop dirt with a small gap, it's going to be a pain if it slowly drops or jumps when you hit something... If you're using a mower deck, you'd want it to float a lot.
In addition to the check valve, their cylinder design makes it less prone to moving. There are other cylinders out there designed for more easy movement for float.
It's a bit of a mixed bag and it's a shame you can't have it both ways...seems like you want both a float and non-float cylinder available.
Also found out agristore gets their tilt and top link cylinders made in Italy factory.