Converting Polaroid 350 to 4X5 or 120 or Paper ?

I have Polaroid 350 and want to use it.

- I could not figure out how to remove battery compartment , it is bomb proof made.

- I could not figure out how to install 4X5 back to the camera for no light leak and correct focus.

- I thought chinese 2016 120 bw film is cheap and I did not see a 120 format polaroid , is there any ?

- Which is simpler to build to , 120 or 4x5 format ?

- I am thinking also paper negatives but lowest asa setting is 75 and I have 8 seconds to burn the paper and there is no release cable and pressing 8 seconds on the red button will move the camera. Would it ? I can buy moderate quality tripod.

What do you suggest ?

Umut

Umut, It won't make a very good 4x5 camera, nor a good roll camera. Why don't you shoot the film made for the camera, Fuji FP-100c?

The battery compartment should be fairly easy to open from the back. The Polaroid 360 battery compartment opens from the front of the camera, you have to put a pen or other sharp object in the hole in the front to get it off.