Thanks mate,
I had to put 3 layers on in 3 places and it is good now. But im having so much trouble colimating it. Im not sure if its becouse of the Barlow or not but I cant get the crosshair on the cheshire to centre, i have the 3 primary mirror clips in view and the centre dot from the eyepiece is in the middle of the donut on the primary so im hoping it is now colimated. Does this sound about right to you?
Thanks Dan
