Thankyou for the comments Steve and Dave
Incredible Perth seeing did its work i believe looked at the data though CCDIS last night and the FWHM was well down for the RGB it was 1.5-2 and for the L it was 2.5-3 the lower fwhm i can attribute to 2x2 in RGB but for L thats raw!
we have to remember that this is coming out of a bog stock chinese mirror not a custom hand ground and figured one. mmm i have my sights set!
Me and a few imaging friends are heading out to a site where the sky regularly reaches 21.5 SQM and beyond so here is hoping that i get some windless beautiful seeing evenings!