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Thanks Logan and Colin for the feedback.
I used the blue moon a couple of days ago to illuminate the inside of the OTA while visually looking trough the focuser, trying to identify the nasty reflections I noticed during my recent dark sky testing.
It turns out that nothing is wrong with my baffle tube design. The reflections are coming from the two inch bore of the focuser. My camera nose piece is very short and that leaves part of the smooth bore of the focuser exposed to off axis illumination.
I won't even need to pull the OTA apart to fix the problem.
I'll be ready for that, long overdue, half decent comet.
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