Requoil on the falcon forum says Polarwolf and Iain know a thing or two about the FX range

So a couple of questions if you dont mind.
1). There seems some discussion that the fig 8 band should not used on the cutlas as it was designed to be a free floating barrel - any thoughts?
2). With the best pellets I've found for the gun (falcon accuracy plus) - the Skan chrono at the range shows about 50% of shots are in the 12.05 - 12.15 range. If you dont want to answer in open forum where the power adjuster is please PM me (is it just a spring tensioner like the falcon at the back?) I dont fancy a jail term in the UK
Thanks in advance
Chris