Was about to get a toy- then I did some research...

[Kitwn]

Hmmm, I’ve taken a leap of faith and ordered a set for myself. Recently got a surprise rebate from my energy company (their automated system had increased my monthly payments and had built up a big surplus) so I think I’ll start getting parts for my second machine (that’s if I can update my first one). Will be interesting to try out.

I hope you are not disappointed!
One thing to be very careful of is the quality of your soldering inside the 4 pin plug to the spindle. If soldering is not one of your strong points, practice until it is

The power transistors in VFDs and stepper drivers are not very tolerant of sudden disconnections or short circuits to earth and many of the sob-stories you read about VFDs that failed early may be due to poor installation rather than a bad product.

Good soldering depends on cleanliness, a one molecule thick layer of grease from your fingers is enough to make the difference. Flux is also important. If the solder is forming blobs rather than flowing freely over the wires and pins then you have a problem. The old saying 'The bigger the blob, the better the job' is NOT good advice. Sleeving on each pin inside the plug is also a good idea and, as others have mentioned recently, a cable clamp on the Z axis assembly to stop the cable moving as it enters the plug is essential. I assume YouTube has a choice of videos on how to solder.

Sorry if I'm preaching to the converted and your soldering is exemplary, but I'm sure we have plenty of readers who buy their first soldering iron specifically to install a spindle and an expensive VFD is not the best device to learn on.