Get the Baader 7Nm, 2" (also known as 48mm) filter from wherever you can buy it cheapest. I got mine from Hong Kong.
The QHY8 works well with it, exceptionally.
It will screw directly onto the front of the MPCC, and in my case also the TV 0.8x reducer, so I assume also the W/O Reducer.
I didn't remove the default I/R filter nose piece, and neither should you, unless you want all that moisture in there.
Gary
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