Reply by Loren

Pin router is a good way to do it. Most are 3 phase. The old
Delta ones with the round columns are accurate enough
for this job, but not for real precision work. I have a
Delta/Invicta RU50 and it’s a nice balance of precision, power
and not too huge.

Another way to do it is with a shaper with a rub collar and
a vacuum template. With parts that large you can mount
a couple of handles on each template and have the
air hose coming out the center and routed overhead.

Farm out the sanding.