So. My Christmas present finally came.
A Boss DC-3.
I've got the DC-2 Waza which is superb if you use it in stereo. It even emulates the original rack SDD-320 unit.
This one is a variant / follow up to the DC-2 pedal but with knobs instead of presets. I think its a fully digital pedal (the DC-2 and DC-2 Waza are analogue). Looks to be in very good condition for a 30+ year old pedal. And Boss pedals are virtually indestructible.
Yippee !