Battery cover and retention system for Scott broadcast spreader

I dug out my battery operated electric broadcast spreader because it was going to snow and I wanted to get my driveway ready. Alas, the battery cover screw was all rust and corrosion. Of course, I stripped it (sigh). So I drilled it out and put batteries in and did my salting. I had just put the cover back on and used duct tape to keep it attached. But... I have a 3D printer! I can't do something basic as using duct tape I have to overcomplicate it lol.

I tried originally something more fancy that went in all four post holes but getting the posts all the way down to the bottom and still allowing a screw to go in and not get stuck was very difficult. I eventually gave up and realized I can do shorter legs and just use longer screws. So I bought two #8 2" long screws and they work great with this model. Just don't do what I did and forget PLA is not going to take torque well, I cracked it when I used my electric screwdriver to tighten it. Same with the threaded bit that holds the cover retainer in place. It works, just don't over tighten it.

I'm new to all this so forgive the model's crudity, lol. But it does work! My battery cover stays put fine now :) I didn't really need to print a cover BTW, this retainer would work fine with a drilled out factory cover but in my original fancy design I was trying to make the cover had the screw post and I had already designed a cover that fits well so I said heck with it and just removed the post and went ahead and used my own cover lol

PS in Tinkercad the model looks solid and fine but every time I printed it, it ends up a little wonky where the posts meet the bracket. It drives me nuts but I have no idea how to fix it as it looks fine in the model designer. (sigh)