I made a safety sheet for my own purposes, the old model printed with 30% filling broke after testing lifting 63 kilograms of live weight (me) at the place where the rope was attached. Increases the lifting force by 4 times, of course, the model will be finalized, I'm doing it right now. A kilogram can withstand up to 40 for now, but the filling must be set to 100% unambiguously. PetG plastic, nozzle 0.4 mm. In an amicable way, instead of pulleys on the bushings, bearings will need to be installed, and the body itself will need to be made of metal, but I need the minimum weight of the product itself, so the maximum that will be made of metal is bearings, but I will order them later, I'm waiting for a salary :3 I used M5x30 bolts and self-locking nuts, respectively. 

Upd: The tests were successful, and it can withstand 63 kilograms of live weight. 

Upd: He confidently holds 63 kilograms of live weight, it was found out after field tests. In their process, the skin on the knuckles of the left hand suffered, nothing critical, but unpleasant. We have received our salary, we are waiting for bearings, we are drinking beer (I condemn, just in case), we are waiting for the next update. So far, it's working as intended, with minimal size and weight.