It was size mostly, but in the end I decided to wait on it and am putting the money toward (probably) a Tanzmaus, because the live duo I've been getting ready would benefit a lot more from a good x0x style drum machine than anything else, and the Tanzmaus sounds great. In the long run I've got all the blank boards and most of the hard to source parts to build myself some kind of modular, 909-inspired, multi-voice analog drum synth(with the Midibox Seq v4 for sequencing) but that's still a long way off and will be bulky so the Tanzmaus will still have a role even when that's done.
I've got the live rig down to a CZ-101 and an Anushri running into the Octatrack, with a MIDI Soludions Quadrathru for splitting off clock to the other guy's modular, I can add the Tanzmaus and a small, cheap analog delay pedal (one of those little, yellow, $30 Donner pedals - they're not good but they're actually really nice for the same kind of thing you'd use a Monotron Delay or a Radio Shack Electronic Reverb or something similar for, I especially like that the headroom is so low that when you turn the feedback up enough to self oscillate the levels don't get out of control liek a lot of better delays - it just gets more distorted instead of louder) and still be able to carry all of it at once, which is the limit I've chosen for this project - if I have to take more than one trip to carry it all, then I am using too much stuff.
EDIT: looks like those pedals are a little more expensive now but still pretty cheap.
Edited by RSP, 16 October 2017 - 09:18 AM.