I did do the install myself-----
But measured 4 times and cut once!!!
On the pieces mounting to the sides of the boat--I taped the pipe and then cut it with a pipe cutter(roller wheel) for a clean straight cut. Then they epoxy on to the ends plus you drill and tap holes for bolts as well--They have engineered these well--I will be mounting my stern light up there and a radar(plate is there) and there are 2 other plates on top of arch for antennas if you want, plus I like the flat plates on the side--I will be building some hangers there for gaffs and possibly some outriggers.
I get alot of compliments on it--most think it is a custom.
I looked at different arches and custom builds and me builds--It was worth every penny!!