Thanks guys

Right, it's now running tx spring, about 37mm pre load with 3mm port. Feels nice but not scoped it up yet. It's really nice with a mod on, very quiet. I think if I like the tune and stick with it, I will get custom guides as it rings a tiny bit even with a piston sleeve (guide is quite loose in the spring).

Running at 11.3ftlb, 15.89gr. .22 . When I dropped the preload a bit it hit 10.7 and did feel a smidge nicer. Might run it at that as power isn't everything.

I'll let you know how it goes...looking forward to trying it!