I'm a big fan of dial indicators for setups. I use a mag base with one for adjusting the TS fence when I need exact width rips. 
Never been urged to put a t-track into a router table, never can be sure it is parallel to the fence. However by centering off the centerline of the bit I can see its utility for accurate adjustments. Just wish my table was metal so the mag base would work! 😀

My router fence is an older Incra and the fence adjustments are good down to a few thou, but with the larger aux fence attached I need to be mindful to push/pull as I adjust to keep the backlash out. Incra uses a spring in the adjuster so when pulling on the fence all it is doing is stretching the spring.


Either way, it's cut, measure, adjust, then get to work!