Since joining this site, I have mentioned in a couple of posts that I needed an HF spindle drive inverter (1000hz, not the usual 400hz, and also low voltage - 60volts). I have been trying for several years to get a spare as I knew that my inverter was out of production, and nobody seems able to offer a repair service. I contacted Jonathan who told me that he could configure his new driver to suit my needs, so I ordered two of his new drives. Last week my inverter failed and a quick call to Jon had him burning some midnight oil to finish and set up one of the new drives for me. Thank you Jonathan, I have just installed the new driver and have in fact completed a small job. The spindle runs faultlessly throughout the RPM range and I am very impressed. I am aware that this driver can be configured to perform many more functions than I require, but I am over the moon that I have been able to get an inverter that will drive my spindles. Thanks again jonathan. G.