Dan, I believe jjj and RobF both had these issues with skywatcher newts. I'm not sure what jjj did and she is away at the moment, but RobF added a coma corrector which moves the focus point out of the scope. The baader mpcc is front threaded for a 48mm (2") filter and I see you can get a GSO branded one now for less money. The cheapest option though is to move the primary mirror up the tube as outlined
in this article.