Hi guys, as the title says, has anyone done a belt-drive conversion of this type of mill?

I have already eaten 2 sets of spindle gears, and just blown my spindle motor, and so am really quite keen to convert it to a nice quite belt drive and VFD/Induction motor. I'm not really looking for a higher top rpm, as my mill is still manual.

Unlike the smaller BF20/G0704 there are no obvious splines at the top of the spindle to attach a pulley to, and I'd quite like to keep the quill operation.

Any pointers would be much appreciated.

Ta.