Plz help! I've replaced my motors at least twice and replaced the plastic gears inside multiple times. I've also recently replaced the control module. The motors worked about a dozen times, then began to grind the plastic gear again. I have probably spent nearly a thousand dollars over 4 years and am at my wit's end. I don't want to sell it but can't afford to continue to pour money into a bottomless pit. Thanks for any suggestions

are you sure that everything is aligned properly?