I grew up around people who made stuff and sometimes re-made with changes and improvements. As I’ve nattered on about it this year I purchased a mini lap charkha (https://www.facebook.com/minicottonspinner/) and love it. I work cramped and it’s portable. Day job staff meetings via zoom are so improved.
First off I’m a clutz. I’ve never seen a charkha of any make that I couldn’t stab myself on. Do they have to be so sharp? That I don’t know but they all are and I’ve found rubber plugs found at most hardware stores or amazon work great to protect me from myself.
As-is the mini charkha works fine with rubber bands. But I’ve found that hair ties work well also, especially when they are looser from use on hair.
I love poking around hardware stores and found rubber grommets that have a “track” in the middle which is great for keeping the drive band steady. I ended up putting all four of the grommets so the band is really steady. (Sorry for the blurry photo.)