Summary

UPDATE: added a design that differs in a way it attaches to the effector plate (flsun-cam-mount-effector-with-pegs v1.stl), see below.

This is a mount to attach an endoscope camera to FLSun SuperRacer. It mounts to the effector plate and is designed for this specific camera: https://www.amazon.ca/gp/product/B07TVD38LJ/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1
It should work for similar cams that can fit in the sleeve that is sized at 5.8 mm diameter.
Since it's clamped there could be some wiggle room. If not, you will need to remix the sleeve.

For the arm that attaches to the effector plate there are two options:

1. flsun-cam-mount-effector_v9.stl - the original design that relies on 2 set bolts (M3). Not ideal as it's finicky to drive the bolts at an angle so they catch against the bolt wells on the extruder

2. flsun-cam-mount-effector-with-pegs v1.stl - no bolts on this one, instead it has two bumps that clamp against the existing bolt wells on the effector plate. Seems secure. Recommend printing this one at an angle so the stress in the clamp does not pull your layers apart.

The mount is designed for PETG. The bolt/bolt self-tap a (reusable) thread in PETG.
EDIT: I actually think TPU might be better, at least for the effector attachment or possibly everything. You can tap thread in TPU as well.

For the camera clamp I used a small bolt that came from an old laptop. It measures 1.90 mm diameter at the thread, 3.85 mm at the head. The one I am using is about 1.5 cm long and it's a bit too long. It doesn't matter though as it does not get in a way of anything. It self-taps into the part.

To join the arms use an M3 bolt that is 8mm long or longer with an M3 nut on the other side.

The focus distance of that camera is about 40-42 mm, so mount it at that distance from the nozzle.