These are vented ESC covers for Sonicmodell's new twin engine FPV plane, the Binary. ( http://bit.ly/2VY0lbF ) The stock kit includes some flat plastic covers with 3M tape for covering the ESCs. I wanted these vented ones to get a bit of airflow to cool the ESCs. I've attached them using "Foam-Cure" glue for EPP/EPO. They fit better than the pictures might suggest, they're just sitting there and not glued down in these, I'll add new pictures later.
Update - Seems Banggood is selling another of my designs without asking... lol Price ain't bad though if you need a set and don't have a printer! http://bit.ly/2OLp40t It's an affiliate link, at least I'll get a few pennies... lol
I printed these in some no-name white high temp PLA. PETG might work better depending on how hot the ESCs get, but they should be fine in the airflow while flying. I'm trying the high temp PLA becuase it's the only white filament I have to blend in with the foam. ;) They print fine with no support if you're printer bridges well. Make sure when slicing, the bridge direction doesn't run parallel with the vertical ribs.