remote volume control

I just ordered and received an IR remote motorized volume controller from PJL Electronics on Ebay. It goes between my C28 and ST-70, and seems to be truly sonically transparent. I have been using an Audiocubics R-cube with my 9090db for years.and liked the performance, though I'd rather have...

I've been searching the archives for solutions that might be transparent and only add minimal noise. Installed between pre and power amps or in the tape loop. To allow a remote to adjust volume and possibly mute also. Anyone wanted to do this and found a solution? Some devices i found...