About This File
These are designed to clip into 2020 extrusions and have a 12mm trough to accommodate 11mm LED strips of the most generic kind. a set of 3 is required to cover your horizontal rails. They clip pretty hard. I suggest printing just 1; interrupt the print after the first clip is done and test on your extrusions to make sure it clips but not unreasonably hard. You can use "horizontal expansion" setting in your slicer to adjst the fit. Print them standing up and with a wall width of 0.5mm: this is required for the plastic to comply when pushed in the slot.
** This is meant as a permanent fixture: be careful when testing as I was only able to remove them by sliding off the end. It would suck to have to disassemble your frame **