go to mytsn.com and download the manual for the 720, theres a good explanation on how to adjust the gap and the endplay, you could shim and have no drag on your shoe, but that does not mean it is the gap.
.6mm gap and .1 .2 are common choices. and the preload changes from every engine manufacturer and varies according to the flywheel cone and the flywheel itself and if you are using a shim behind the cone, so that measure should be only valid from the top of the cluth nut, not the shaft.