I picked up a Rockmaster preamp a few months ago that needed some work. It had a lot of crackly static noise, was cutting out and had major switching problems. I gave all of the jacks and the contacts in them a thorough cleaning, replaced all of the old relays, replaced the missing rack ears, replaced a broken bass pot in the Clean section and put all new knobs on it since it was missing all but a couple. I never tried one of these back when they were popular but I'm loving it now. I've been bitten by a vintage rack gear bug the last few months. I have a Lexicon MPX1 on the way to me now and have to pull my old Valve FX out of the rack to make room for it. This madness has to stop. Anyway, I figured out how to use my Ditto Looper with it today by running the Ditto through a rack line mixer. It's a blast. Here's the clip recorded live caveman style with a Jamman Looper pedal and a SM57 then married to some pictures with some crappy slide show software. The guitar was a MIM Tele. Excuse the wankery and over bends. I was just marveling at the tone and got carried away. I need to stop buying rack crap and invest in a proper DAW rig.