Fully agree. That initial TPS setting with the stepper retracted is with the throttle on the idle stop screw. Usually end up with .60 volts. With the increase of .12 volts up to .72 the stepper is moving the throttle (and TPS) to a good idle position (maintained by the stepper with signals from ECM). If this is good, no need to adjust gap.
I was thinking that you could check/test the TPS by monitoring the voltage. With engine off and power on, look for the initial .60 volts. Then very slowly open the throttle. Voltage should increase in a linear fashion with no jumping around. You could do this with an ohm meter also if you unplugged the TPS. I would also try tapping the TPS to see if the voltage jumps. If it does, replace.
When my TPS failed last year, I noticed it had some gasoline inside it. I'm guessing the odd backfire my bike had helped cause this. That gas then evaporates and leaves some varnish on the potentiometer inside screwing the resistance up.
Also, your 02 sensor will screw up if you leave it inserted in the exhaust but not activated. You can leave it there as a plug but don't expect it to work after.