I used to drill holes in my new rides. Isn't a good NMO mag mount just
as good performance wise? I want to use a 43 inch dualband (144/440 mhz)
antenna.
I get nervous in my old age punching holes in the roof of a mega$$$
truck.

BTW: Repeaters in far West Texas and Southern New Mexico are on top of
high mountains. 1500 to 9,000 feet above average terrain.