Aluminum extrusion window corner retainer

This is a replacement for the little retainer clip they use to hold together the aluminum extrusion frames of those flimsy windows they use in RV's. 

I designed this along with a replacement sliding catch for the same windows. (see my prints)

I strongly recommend printing this in PETG for strength and due to environmental exposures. I print with a 0.8mm nozzle, so you may havre some nominal sizing with smaller nozzles.