In March 2010 I needed to cut a couple of holes in the legshield toolbox for a water temperature gauge and a EGT gauge
I had to cut two holes in the top for the water temperature gauge & the EGT gauge. In the past I’d mark a hole and drill lots of small holes around the mark, drill out larger holes. Then filing the edges until it was neat and tidy. This can sometimes take a while.
I got a hold of a 52mm Q Max hole cutter and went about cutting the two holes. In no time at all I had two perfect holes with no rough or sharp edges and no filings anywhere. They can be purchased from any number of online retailers.