When you have FC/ESC-STACK with M3 hole & the frame has M2 hole. Dont want to drill your frame, heres the solution, just install these M3 to M2 brass rivets, same height as the rubber grommets of the FC/ESC-STACK, so you are not increasing the stack height either.
- Diameter: 2mm
- Inner diameter: 1.2mm
- Head diameter: 3.4mm
- Head thickness: 0.5mm
- 30 x M3 to M2 Brass Adapter/Rivet