It's a piece of cake with a pull saw, and I've removed as little as 4mm
using one.

Again, have you actually tried to do it yourself or are you one of those
armchair experts?

I haven't used one of these on a door but I did to trim the bottom off door
facings so that tile effect laminate(spit) would fit underneath and can't
praise it highly enough. You have to use one to appreciate how good at tool
it is.

Archie