The 17.5's took 4 to 6 weeks for approval.
Most of the ones sold will be down at the Southern Nats
The 1480-1500 is the rotor strength on my meter.
The size of the rotor is a 12.5mm dia. (12.46mm actual dia.)
The motors will be submitted with the 12.5mm and optional 12.3mm tuning rotor (same as the 17.5).
Those are the 2 legal diameters.