The different formats shouldn’t be an issue- you’d just need a converter box or module that includes a shared ground between the banana and Euro system from what I understand. E.g. Meng Qi’s Brass or Make Noise’s long discontinued Format Jumbler are Euro modules that do this. As far as expected voltages, the Deerhorn (theremin) section of PB puts out 0 to +10v from its CV output according to someone who scoped it on MW, so I don’t think there’d be a problem there either. You (and Hainbach) are certainly right though that it’s a matter of PB wanting to cooperate, but I thought maybe the precise CV you could get out of TT might make this silliness possible.