I am tired of trying to figure out why the low speed fan does not work so I am going to eliminate the computer from the scenario and tried to look up DC Control and get nothing. Are they gone? I am considering the Flex a Lite VSC as well but only second to th DC Control.
I'll consider myself decently well-versed with the fan controllers and I would not compare the Delta units to anything else on the market. Not only in terms of function, power handling but also in terms of internal make-up.
Brian is still cranking out controllers - he even has some newer ones out there.
P.S. Note that the rules are about the same for SN. His post on the Corral was a little more complete than the one I found here so I always link to the Corral thread.