on / offs and recharge rate
No, but it certainly improves the trigger response and makes the trigger action far more positive, therefore faster to fire.
Didn't mean to imply that it makes it recharge any faster, as its the wrong side of the regulator, hence comments about increased input pressure. That does make it a difference.
With you on the valve mods, I had a pro-mag valve in my gun originally and was given a field rental valve. For a laugh I tried it, and promtly sold the pro-valve after one days play!!!!
Full flows etc. are all crap, as Tom Kay said in the flatline manual, if it needed more holes, AGD would give it more holes!
Ian