This a work in progress. NOT TESTED
The idea is to be able to use it as a daylight tank.

The parts :

• the top : it is the cover with a hole for the handle and the liquid
• the bottom : the tank itself. There is space for the film cassette and one for the film/liquid
• the axle : the part where you stick your film and then the film got wound around it
• the handle : to turn the axle
• the film lock : missing you can probably use a paper clip or print something to keep the film in the axle
• the locking tab : missing they are need to keep the top on the bottom. You may use a M3 screw to keep the tab on the bottom

How to use it :

• You put an extremity of the film in the axle. Lock it in place with something (haven't really think about it ...could be anything like a paper clip).
• Place the top on the bottom.
• Secure the top with M3 screw (and a small tab)
• Place the handle
• Pour liquid in the tank
• Turn the handle to unwind the film from the cassette to the tank
• Develop like in a rondix

The main limitation I see are :

• Very hard to pour liquid in it as the pouring hole is small
• Could be leaky
• not light tight (?)

I haven't tested it yet

Any idea are welcome :)

The idea is to mimic the rondix 35. It started with the other project, but I was thinking it was too big. I wanted to put the film vertical instead of horizontal as I don't see why it wouldn't work.
Putting the film that was allows not to deal with a leak near the handle which was my main problem with the previous design.