ah
lisdexic moment hehehe. I have them all the time Eg, Maxim take LRGB image sequence... end up with LRGG..... doh!
If you are planning to stay with a newt (bless their little reflecting surfaces) Ide suggest getting a auto collimator as a minimum or the kit from cats eye that has the sight tube, collimated Cheshire and auto collimator. I swear by them and I know people like Sidonio use them too.