Collimation on my main scope was continuing to be a problem despite the new spider. Although last night was nice and transparent again I resolved to solve the issue before commencing any imaging. Although the collimation looked good through an eyepiece it wasn't translating to a flat field on the camera. After spending considerable time not really improving things using well-tried methods I remembered that Metaguide gave some instructions on using the software for adjusting collimation so decided to give that a try. Within a few minutes the problem was sorted with very little trouble. Out of curiosity I put an eyepiece in to see what the collimation looked like and couldn't believe the amount of offset between the main & secondary mirrors that had been applied (interesting!). By now my fingers and ears were freezing so I hurriedly set up on M 96 so I could get in the warm and start doing some imaging at last. Details: 10" f 4.3 Newt. 10x 10 minute exposures @ iso800 with CLS in DSS, CS2, Photobrush & XAT.