Yes it was o lot of work. I gathered ideas for more than 10 years, then designed it and built it in a month.
It is a direct drive machine based on a Technics motor but completely redid the control electronics, the PSU and adapted the negative feedback to the heavy platter sandwich (aprox 5.5Kg). The whole machine is 62Kg.
I was lucky to have a Clearaudio motor and control electronics to A/B test belt drive( driving the rim of the acrylic platter) versus direct drive. It was very easy to A/B test by quickly removing the belt and starting the DD motor. In it's final design/tuning stage I prefer the direct drive.
P.S. It is still not in the final stage but I'm very close to what was my sonic/technical intention.