u/possible_ceiling_fan

Had these pistons machined, came back like this. They were pretty filthy so I'm not sure if it was me that got them mixed up or the machine shop.

The rods and caps have letter markings that are supposed to line up, but they're all mismatched. It feels like they were machined mismatched so I'm curious if I should leave them as machined, swap them to match, or if I'm screwed.

They were machined to 0.25 u/s (or for 0.25 u/s bearings, I can never remember the lingo) so I'm curious if the mismatched pieces would have been machined to a specific total diameter, or to have the exact same amount shaved off. If they're machined to be diameter matches to the crank, then I would think I should be fine. Otherwise I may indeed be cooked.

Tbh my fault either way both for not keeping them labeled properly and for not checking when I got them back. C'est la vie, lesson learned

Essentially I'm trying to screw something against the wall on the other side of a shower. It has 4 attachment points, 3 of them are quite sturdy but the 4th lands at the place where the shower has a shelf built in to the wall, and no OSB etc to speak of, just tile on sheetrock. I don't need it to be sturdy I just need it to not pull off the wall. Obviously can't drill through the tile

Edit: Can't move it either, any viable spot just will not work.

It's a round mounting plate with 3 holes. My thought was to squirt liquid nails deep into the drywall in each screw hole, and cover the back of the mounting plate with liquid nails. My concern would be that it would just rip the sheetrock.

Any thoughts / ideas? More appropriate subs for this?