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Sorry Ash, and call me thick if you like, but I can't see the problem.
The T ring I understand, as too I understand the MPCC (I own one myself). The 1.25" has me beat, and I am assuming it and the 2" screws onto/into the draw-tube section of the focuser, is this correct?
If so, I can only assume you have tried the MPCC in the 2" section, while it is screwed onto the draw-tube. If this is so, then you likely have the chip too far from the primary, like Doug did.
One thing you could do with this is have an adaptor made that screws into the draw-tube and allows the MPCC to slip in, like a sleeve. That would get the T ring all but hard up against the end of the draw-tube. Try what Doug suggests, find the position required first and sort out how to achieve the result.
Gary
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