Man, I look forward to hearing your tracks! Sounds like it would be right up my alley. I just picked up an old 166 (essentially the PCB version of the 165) and you're right, the peakstop limiter makes a great bass distortion!
Have to agree that the Xero is a ridiculous dub pedal. I just received mine during xmas vaca, and haven't had a chance to use it with my dub band yet, but I've been getting some serious dubby subby sounds with it in my office/studio.