Main body for lubitel2

I redesigned the body of the original project for the Lubitel2 camera. This camera has a different mount and latches. I also added a hook for more secure attachment using the film winder handle on the camera. Almost everything is assembled according to the instructions in the original project.
The housing latch is secured with M2x6 screws.
The rollers feature enlarged gears for better engagement when advancing the photographic film.
Added a tool for driving the tube onto the roller.
Increased the size of the push rod.
Washers were added for the springs, as the springs were damaging the tensioners.
My door handle broke over time, so I added a door handle model designed for an M3 screw and heat-set inserts.

Unfortunately, I wasn't able to fully solve the problem with photo developing. I tried using both aluminum and steel tubes, and even experimented with heat-shrink tubing, but I couldn't find an ideal solution. If you know how to fix this, it would be great if you could share your knowledge.