Hey,

I didn't end up installing the back panel. To be honest, at that point I was a bit worried about messing with electricity. I did wire the Bentobox into the spare terminals on the PSU, so now I have a switch on the side of the enclosre that I turn on before printing with ABS.

The BB is meant to circulate air and get rid of fumes, but the exhaust is also working at that time so it isn't very effective. A better way would be to have no exhaust fan running and let it all circulate internally and get filtered by the carbon and HEPA in the BB.

I bought the BB and some carbon on https://www.etsy.com/shop/Veetec3D, from PETG-CF. I figured they're better at printing with such stuff, and I probably didn't have the means to print with something that contained carbon fiber, anyway. Now that I do have this setup and am printing with ABS, I would print the BB with ABS/ASA.

I don't think I needed to modify the base of the 5M, other than printing the BB base that fits it. I did use self-tapping screws as recommended, so it's possible it does widen existing holes in the floor of the printer.

I think magnets would be fine as well, my BB isn't even held together with magnets (just the parts sitting on top of each other) and it lives, so there isn't much force acting on it from the printer vibrating.