The hardware mod method depends on a raspi rp2040 chip to fiddle with some CPU lines and emulate the storage, so the mega-cheap way involves a little fabrication and fly wires to a $3 board, but you can get premade flex-pcb kits called “picofly” boards for crazy cheap now, like 20 bucks. The hardest part is the precise and delicate soldering that absolutely requires skill and some high quality tools, but it’s not outside the realm of possibility if you’re already equipped and experienced with microscope-level repairs. It is an advanced level DIY procedure, and not for the inexperienced hobbyist.

Yes. You can mix it into “normal” resin to give additional toughness to the parts. It helps with small features that might require more delicate handling normally. I’ve used it at like 20-30% for stuff that needs just a little give, all the way up to like 80% for stuff that needed to be fairly flexible.

You can mix in a product like Tenacious resin to give them a little more flexibility to resist breaking

Quite an oversimplification, but it hit some of the high points. It’s a good little opinion piece, and worth the time, I think.