RE: RClander T33 for 90 or 120mm edf
I decided to try the new Turnigy SK3 Fandrive motor. My other 39mm diameter motors had the same mounting pattern as the Lander 120mm fan housing so I suspect this motor will also have holes 25mm across. It is a drop-in replacement for the original version inrunner motor and will supply 4000-5000 watts of power depending upon the actual Kv. I will still keep my original 120mm DF in my T-33, because it has plenty of power for the model, and use this new version for another project after running some tests.
My friend will drill the rotor adapter from 6mm to 8mm with a true center. The rotor adapter has plenty of base area to allow an 8mm opening. The 8mm shaft on the SK3 Fandrive motor will keep the rotor spinning true and vibration-free. It should create a nice 120mm power system for about $300 less ESC.