thanks for all the input, Dale and Holly, took your advice a quick spray and wipe down with wd40 and backed off the "over travel" screw to give it a touch more and all seems to be well with PT now. Will give it a good run over weekend and see that it is finally sorted.
Thanks again all!
FTP900 +Sightron S111 10-50 x 55
AA Pro Target in FWB FP70 stock + MTC Mamba lite
Daystate Airwolf + Bushnell Elite 6500
" life is about the memories we hold and not the things that we own"