Thanks Dave, that is an easy approach- also good to know I did not miss one of the Ross switches that could do this directly. I tried the 010 fitter with the #4 switches and looks like 4" on the button CTC. It is the one on the top. So for any who look at this in the future (six inch RR-track grid):
Top: #4 switch ladder with 010 fitter track, 4" CTC. Middle: #4 switches only, 3.5" CTC. Bottom: #5 switches, 3" CTC