Help me understand the specs on a neumotor.

[Kiwi]

Neu 1515 1.5d/F Sensorless Brushless Motor

What does "1515" mean?

I know that "d" means the configuration of the winds but what effect does it have on the motor's performance? and what does a 1.5d armature or can look like?

What does "F" mean!? Some have "S"

Say I'm going to run 22 volts, do I want a 2700Kv motor so the RPM reaches 59,400? which is under the maximum of 60,000?

This is a shot in the dark for me, because I don't understand the rest of the specs.

Also, does a 32p pinion work with the spur on the 8ight/Muggy?
I really want to go with a sensored motor, because of the cogging problems with my Mamba Max ESC, makes me like brushed a lot better.

Thanks,
-Matt