with the help of my E2 box - i was able to establish the problem and fine tune using wifi and app on fone connected to my E2 STB - my sat meter couldnt handle the symbol rate, its only a cheapie so couldnt use that as it didnt recognise the TP
anyway i now have the EPSN TP solid (on this fine day) at 9.5db lock - no glitching - it will only take the sligtest cloud \ rain for it to go im sure.
glad the 1.8m could do it in the end!!!!
i had better luck with a home made straight plate than a T plate.
now i need to work out how to water proof it