Funny enough I played again last night, and tried to control feedback by muting with both hands, 9/10 it worked and i think i may have it under control, however for say, the start of songs when i have the dirty channel kicked on sometimes it will squeal.
The threshold knob was on 11 o'clock all night. And i also took the gain down to 5 on the pre-amp. It was on 6 before. I backed off the gain on tubescreamer which seemed to reduce feedback.
I also noticed on the wireless receiver the signal light to detect there's audio coming from the guitar kept flashing red several times, whatever that means.
I prefer not to be messing about with foam and stuff, just hassle for me and knowing me i'll probably mess it up!