Very good work, Marc. The mechanical concept is the same that mine. I canīt see the need of moving the baffle. On the contrary, I used the baffle as reference for the colimation of the primary, because it seem well mechanised an centered in the tube.
Very interesting the way to collimate. I have create my own system, but I need to remove the lame for to do it; i will thing about your way a bit more
For to fix the mirror Celestron used a some kind of two component silicone, like is used for moulding. These silicone fill all spaces but not adhered parts. The silicone I used yes, is the same we used for the windows glass. And yes, is a good way to fix telescope mirrors, but requires some care: because the silicone have some contraction and produce a stress and deformation of the mirror, I put three coins between the three dots of silicone and when the silicone is cured I remove the coins and the mirror remain "floating", and the dots of silicone compensate its contraccions.