Tools for "pelletizing" pre-biochar home waste - or, how to efficiently use small scale can retorts

This thread is a description of a process I've discovered and found very helpful, and a question for anyone that might have a tool suggestion!

I've been doing very small scale biochar production using the tin can method - remove one end of two cans, crimp one, poke a hole on the other, fill with materials and press the cans together to "seal" them, and toss the can into a fire or on a grill to convert the materials to biochar.

My goal has been to convert any paper-like home waste (paper towel, kleenex, paper plates, newspaper, non-glossy/bleached junk mail) into biochar, but the biggest constraint for me has been trying to be as efficient as I can with the biochar process, as I can't make a large fire or similar.

One tool that I've found very useful (after spending a long time trying to find something that worked) is a "rosin press". It's a metal tube, with a metal cap on one end, and a metal peg on the other end. I can put kleenex or other paper materials into the capped tube, put the peg in it, and then press it in a vice to produce a very compressed pellet of pre-biochar. Once turned into biochar, these still retain their pellet-like structure, and can be either crushed up or added to my compost piles as-is.

The only downside to this is that it's very physically intensive to bring small amounts of materials to a vice, tighten it as much as I can, and repeat until I'm out of materials.
Does anyone have any suggestions for a more efficient way to do this, or any hobbyist/home electric presses that would work for placing pressure on a small tube like that?

There are electric rosin presses, but they're all designed to heat up the tube as well, which is not something I want or need - I'm just looking for a way to put a lot of force into pressing the peg into the tube.

I'm no engineer, but my first thought is some kind of lever, kind of like those machines to reload shotgun shells, or like a can crusher.    

Any of the sawdust briquette tools ideas on YouTube should be adaptable if they get the pressure you need.

The problem I had with all the low tech ways to press briquettes or pellets is they are extremely time inefficient. The time efficient semi automated machines are way too expensive for this scale.

The “best” solution I have seen for a homestead scale used a 20 ton shop press and simple tube dies made from metal shop scrap. But I am biased because I want a powered shop press for other reasons.

This is a good process for bringing people into biochar. Some live in apartments, or for some other reason, can't really make a reasonably large fire.  For some of them, they will eventually buy a home or get into a situation in which they can make a larger amount of biochar.

John S
PDX OR

I suggest an antique style pill roller:

On a large scale, a seed ball making drum like these might work:
https://youtube.com/playlist?list=PLUQMDg9HfMjhNeUXTlsYEHtce9b3K6qyk&si=rFeisdnR0A6E86