Chenbro RM42200 radiator mount drill guide

This guide will work with BoA's model or my Remix.

I suggest mocking up the radiator and mount assembly and moving in into place to determine the correct location.  

Mark the location with a sharpie and remove the radiator assembly.  

Clamp the drill guide in place with a c-clamp or similar.  

Ensure that alignment is correct and guide is square.  

Drill the holes through the guide.  

For M3 screws, a 3.5mm drill is reasonable.

Deburr the holes and countersink the outer side.