Ahh. Been awhile since i read that.

I have been running the lab supply this way about 6 or 8 months, so not real long. The toroidal close to a year. The switcher close to two years and I haven't used the linear supply in about a year. Used it for a couple years before, but not with Gecko's.

It may depend on motor and machine size and type as to whether it's required. I know I am only running my motors at 3 amps for 201's and 203V's, so not even close to their rating on amps, but closer to the voltage rating on one set of 203V's.

I don't think the Taig is capable of putting out the back emf, but maybe I am wrong. It's obvious that I don't know all I think I do.

Let someone else chime in that knows more on the subject.
Especially if you are running the 251's closer to their max voltage and amps, as you would be capable of with that lab supply.