This is my first design, made in Fusion 360. I needed a support for the rx antennas and also a support for the video antenna (i have a SpeedyBee VTX with pigtail) but i couldn't find a design that suited the clone DC220 frame, so here it is!
EDIT 31/08/2019: added an updated file, with slightly bigger screwhole, for easier mounting ;)
Supports needed for the vtx antenna hole. Printed in PETG for higher resistance, but i'm sure PLA would work just fine.