That’s what I meant was 550 paracord - I use it for so many things. And the stretch is a tension benefit.
Yah the 56” mill with a 3120, 60” cannon bar and 404 chain. I have 3 of the perpendicular supports in the middle the 56” mill jig. + the drip nose oiler.amazon has them for $13 rn, looks like you'll need to fabricate it onto a mill.. either weld or bolts. but your back injuries are probably from lifting/manipulating the saw from the ground, learn basic lifting techniques (close to body, straight back, use the legs). wait for your back to heal, any pain will make it worse.
I just started milling on the ground and hurt my back with a little 30cc mcollough lol, gonna have to man up for my 880 clone.