Step 1: Find Your Holga
(The stopper is the little bump in the second picture)
Step 2: Begin Disassembly!
Note: If you ONLY PLAN TO FIX THE SHUTTER, there are only 2 screws you'll need to remove. IF YOU NEED TO REPAIR OR DO ANYTHING IN THE UPPER HOUSING OF THE HOLGA, you'll need to remove only 3.
Step 3: Repairing the Shutter.
NOTE: It is okay if the prong is a little bit forward of the bump! Just make sure that if you shine a light through the lens of the camera that you cannot see it from the closed shutter.
(You might want to tweak the fitting a little bit to make sure it fits perfectly.)
Step 4: Restoring Cracks and Holes.
There are several ways to fix this, but I wanted the fix to look as unnoticeable as possible.
I would recommend sheet plastic or anything else that you can find that will be able to seal the hole.
However, I used a spent shot gun shell, because it was identical in color to the plastic of the Holga.
Once you have the hole covered from the outside, you'll want to light proof the seal from the inside. To do that you are going to have to remove the 3 screws on top of the camera. The first one is pretty obvious, but there are two hiding underneath the film winder.
It comes off super easy, and you don't break anything in the process.
After you have removed the screws, you'll be able to get inside the camera and put ducttape on the inside of the cracks. Once you feel that you have done a good enough job, go ahead and seal it up and put all the screws back on! Don't forget To hot glue the film winder back on when you're done!