normally I just drill them and join the holes to cut out apertures such as windows and port holes,,,,,,,,as its easy to use the side of the drill bit to cut out amall area such as this………
however I had a large area of roof to cut out straightly, and a friend told me to get hold of a dremmel attachment with small circular cutter……….
i'm not short of what I've got, and bought a big set of them years ago………..so have been using that to cut out holes recently…………that hatch was cut out within the first couple of weeks of starting the model……..but the hole in the roof is much straighter, lol.
