The alky kit is progressive. I would always leave it on. It also creates less wear and tear on controls from switching on/off/on/off.. and one less thing to worry about.
If your going to bump up the timing, i'd be running more gain than 3.5. I'd probably have you set that to 6.. and work on it from there. I dont have a lot of experience with the Caspers TW chip...altho I have played a lot with the MaxEffort TW chip.
I think most reading this would say .. if its running good.. leave it alone