2400w @ 450RPM from 96 magnets gives me great hope! I have currently done about 90 microwaves (180 magnets) and have another 50 odd to go for a total of 288 magnets in my 20" dual rotor radial flux alt. I will be using 3/4" neos in the centre holes and laminations in the stator. I'm hoping for around 10kW @ 200 rpm. Any more detail on your alt would be great (dimensions, clearances, windings, gauge....)