This is not entirely a handtool project but at 160 lf I may be crazy but I'm not insane. The inside radius of the gutter is 2" and the largest cutter anyone would make is 1 1/4". I hogged out 1" on the shaper then a series of rabbets using a electric router but the remaining was done with a #18 round. It still took 2 days to do... Then came the face profile. I cut a wedge off with the tablesaw but the rest was done by hand.