After acquiring my longtime dream astrophotography scope, a 10" Truss Tube RC, I went through the process of making it the imaging beast I knew it could be. After taking care of known issues, like the baffle tube not being long enough, I discovered that I had a weird halo gradient on my images that didn't show up in flats that was difficult to tame. Taking a close look at the scope, I discovered a gap between the rear plate and the M110x1 collimatable focuser mount tube. I poked at the idea for a while, then decided that some neoprene foam around a 3d printed baffle would be the best solution. This completely fixed my problem.
Inner diameter is ~82mm, so vignetting should not be a problem. It's larger than the M110x1 adapters for both the Pegasus Astro Prodigy and Optec Hercules (pictured).
You will need a 1/8" (~3.2mm) thick, non-adhesive neoprene foam sheet. I cut mine to 2 3/8" x 12" (6x30.5 cm). Wrap the baffle with the neoprene and insert into the focuser mount.
Print the baffle tube with a matte filament with at least 3 perimeters. I used carbon fiber PETG with 0.2mm layer height.
The author marked this model as their own original creation.