If you're getting the Batumi, get the Poti expander. It's cheap and gives you instant access to different wave shapes, sync/reset options, etc. Most of these functions can be changed by pulling the module and moving jumpers without the Poti. But why suffer that kind of torment?
-- Ronin1973
Hi Ronin1973, I’ve had the Batumi for some time now. I thought about getting the Poti for awhile because ya, pulling it in and out to change waveforms was kind of annoying.. But then some months ago this kind person made this alternate firmware(http://voltexture.hiho.jp/batumi-individual-wavebank-firmware-v1-0-released/)! This added random waveform types(which is typically all I use now) for the middle outputs as well as a new layer of menu to control the type. The added complexity paired with the expert firmware made it a bit of a learning curve, but now that I have it down it feels totally worth it.