Not exactly sure what you're talking about. The Staton Inc shift kit allows you to have 3 chainrings to drive the rear gears. Here is a Staton setup I like to do for a 24 speed bike: 18.75:1 gearbox; GB-SK 15:44; rear 8 speed DNP freewheel or cassette (34,28,24,21,18,15,13,11); chain rings(28,36,44). Shift patteren 1(1,2,3) up steep hills towing. 2(3-6), 3(6) level ground. 3(7,8) over drive down hill. The only time you shift the front chain rings is when you're in 3 or 6 in the rear. Before stopping going up a steep hill be in 1(1) then use that as a starting gear. For all other stops be in 2(3) before stopping then use that as a starting gear. This systems gives you 10 easy to understand gears. It eliminates gear redundancy, cross chaining and chain droop.
I either use a thumb throttle with 2 twist shifters one on each handle bar. Or use a twist shifter for the rear gears and a thumb shifter for the front chain rings. I the mount the shifters on the left handle bar and put a twist throttle on the right handle bar.