Jason,
please don't take my comment as a criticism, and if it works, even better.
The main concern with any off axis or separate guiding system is flexure, or differential flexure, between the imaging system and the guiding system. If there is any shift between them it shows as poor guiding, blobby or elongated stars etc. Try yours, and if it works, I will be the first to congratulate you. And if it doesn't, simply modify what is already an impressive piece of engineering.
Gary
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