I wanted some wedges that locked themselves in place, e.g. no x or y slip.

This is what I thingied. You need to one of each to have a locking pair.

Use scaling in your slicer to get the size you want.

Freecad file also attached

ELEGOO

ELEGOO NEPTUNE 4 Plus

Doesn't Matter

No

.34

20%

No Brim

File attached. Sorry, I smashed this out and didn't parameterize it.