If your LiftMaster 2280 garage door opener makes a loud THWOMP every time you activate it, chances are your 20 year old vibration dampeners have sheared off like mine did. Replace them before your motor rips through the RPM monitor cables, because that's a pain in the butt.

I designed this by hand to mimic Liftmaster part 041B0139 because it's 16 degrees outside and I can't park outside for a week while they snail mail them to me.

I printed it in cheap TPU on .30 layer thickness with 4 walls and 15% cubic infill. It's a perfect snug fit and seems to handle the load well even though I only installed 2 (too hard to get to the top 2).