I recieved my upgraded f75 yesterday not sure why but they sent me what apears to be a brand new unit with a different serial #. so i went to a school yard this morning and was really happy with the performance i was able to run at 99 sense in all modes exept fa mode it got a bit noisy so in fa i ran it at 60 i was only there a hour did not find anything good but i feel the upgrade was well worth it. i think the all metal is a bit weaker air test im getting a quarter at 15 inches before it was more like 17 inches i think but thats ok i mainly hunt in disc im hoping to get out some more tomorrow and hit some some heavy emi areas to see how it does hh