I cant justify a line boring machine like that of Blum because I dont do a lot of volume, rather a project that can take a year to complete soooooo
I drill 7.5 mm dia., holes on 2 1/2” center to center using a drill press with a fence and depth stop.
I mark out the center line of the gable, and then mark center lines up and down from that, then use a “square” framing square and a sharp pencil. By “eye” I dril;l the center hole and transfer that center mark the fence on the drill press, after that its only a matter of lining up the marks with the fence and drilling. I prefer the flush brass/chrome inserts but you could use any pin system. It doesnt take a lot of time and I have yet to recieve a complaint
-- "Good artists borrow, great artists steal”…..Picasso
