Thanks guys
It was an easy thing to do in the end really, the actual lens cell is easily removed by undoing three screws, the main tube end housing was squared at the factory at time of manufacture and this is what sets the front lens cell square and thus collimated, so all that is necessary is to remove the lens cell, clean and replace, collimation is unaffected (hopefully?) Roland Christien assured me so I believe him since he made it...but I'll be happier once I see those tiny perfectly focused dots on my screen
Tomorrow?...install the Astronomik narrow band filter set, giving me L R G B Ha SII OIII in my 7 position filterwheel, stay tuned
I have the HBetta too but it won't fit in the wheel unless I remove a filter
Mike