From the same people that make the MOSE/Hercules2 power supply that I currently use, I should be receiving my review sample of their new DC motor and computer controlled power supply/speed controller. Similar in concept to the Linn Radikal, but it measures speed differently and will certainly cost a lot less. I believe the Radikal is around $3900. The Mose / Hercules2 replacing the Valhalla gave near Lingo level performance. Have to wait to install mine and run it through it's paces for an honest review before I can say more here. My last attempt with a DC motor ( a DIY kit based on Origin Live parts and design) didn't work out too well for me (motor failure due to sitting in a hot storage facility for many years, not a fault of the design).
I believe these photos are of a pre-production prototype:

I believe these photos are of a pre-production prototype:
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