Bushing on shaft under mechanical advance?

So if 15 is slow that would make 17 really slow right? I guess the day of taking your distributor in and having the guy put it on the I think it was the Sunn machine. Remember it was red when I went with my dad on his 70 RR distributor for him to get it recurved? To make sure the dual points and dwell we're set right. It is dwell right been awhile. Thanks for the info love this site.