This particular control horn is better when produced in the shop, due tothe required angle of the dangle between the elevator arms and the control horn. Besides, a custom made part gives a sense of accomplishment.And if you build a lot of planes you probably have everything you need lying around as left overs ie. no added cost, trips to the LHS, or ordering and then waiting for a delivery. Seriously, I spent more time thinking about this control horn mechanism than I did making it. But then that's just me.LOL BTW I made two,one 1/8" with the red bearings and one 5/32" with the blue bearings. Ultimately I went with the 5/32" because it just seemed stronger.