I've made it about 10 times already. Made it from PLA, ABS an PETG (latest). And it goes better and bettrer with each make. Unfortunately all the plastics are not enough strong for such a hard duty and breakes, gears are deforming so with, let's say, 5th's version of customized pulley the longest time of lanmower work was about 20 minutes, which is 2/3 of my grass area :))) I think I spent too much time during last and this year to make my Bosh Rotak 32 work again. Give up.