Mick,
I reckon it works, as does a local ATM guru who I regularly observe with.
My humble 10" f5 gives such good images he often comments on it, and he has a 16".
My baffling essentially replicates the Intes Micro Maksutov Newtons. I can e mail you some pictures if you like, but seeing anything is difficult, it is that black, LOL.
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