It is a bit of a can of worms unfortunately Mario. Whoever designed the Skywatcher crayford must have been smoking something fairly strong on the day.
Have a read of these threads for ideas. Broadly, options include:
- new low profile focuser
- cutting down 2" adaptor (what I've done and works for me)
- cutting OTA to move mirror closer
- putting longer screws on mirror
- reaming out inside of current focuser barrel
http://www.iceinspace.com.au/forum/s...ad.php?t=33290
http://www.iceinspace.com.au/forum/s...ighlight=focus