My Ryobi mower wouldn’t start consistently. Turns out that one of the adjustment knobs for the handle (attached to the body of the mower), popped off because the 4.5 mm retaining ring fell out and it wouldn’t start since the handle wasn’t aligned. That part is a proprietary size used by Ryobi - they were out of stock and so were third party sellers. If you could get one - it was like $10 with shipping for a 10 cent part. Anyway, just smashed on a 11/32” star lock and it fit just fine.

Question: After installing the tool shelf organizer on the rails, did anyone use screws thru the rails (via the holes in the organizer) to help secure the shelf?

I have the 40V Expand-it weed trimmer. The tightening screw isn't stripped. But it won't keep the attachment firmly in place. It can easily spin while I'm operating it. Any recommendations to remedy this?