The reason I say Kv probably won't have an effect on tire size is this: we are working within a fixed stator size and copper saturation for any given motor. Whether it produces 1200 watts with amperage or voltage is up to the wind count and matching voltage. For your nail example, if we fix the weight of wire to wind around the nail we shall get different wind counts based on the AWG used. At least for a fixed voltage, the larger AWG wire will have a stronger magnetic feild.
I do know that kt is directly relational to kv, but as kt goes up the amp draw of the motor goes down too- making torque guessing impossible without actually testing.
Not sure where I am going with this really, I think I have convinced myself that wind count might actually change how hard you can gear the motor
I do know for a fixed voltage a higher turn motor can be geared a bit higher, but that is based on heat and wattage loading of the motor from my understanding.
I ask this: do you think a 10t on 20v or a 5t on 10v would have any startup differences assuming the cells and ESC can deliver the power? In my time I have messed mostly with gearing and voltage and kept wind count constant.
As for building the 3032, I was gonna fix the stator with 30min epoxy or green locktite. The 3032 isn't something I want to take apart multiple times as the ring bearing is pressed in. My plan was to use 24awg wire most likely, I have a 5lb spool of it. Another thing we could mess with is magnet count and arrangement. Probably want to stick with dLRK or 12 slot /16 pole ABCx4 construction for direct drive.