I recently bought a BDDI too, wish I done it before, a great and icon pedal! I also put together a small PT Nano + based board which includes a TC Corona Chorus mini.
My chain is PolyTune mini -> Spectra Comp -> SubNUp mini -> Moorer FOG -> Corona Chorus mini -> BDDI.. even with all the mini pedals it's a very tight fit. I may change the order, I'm having issues with the FOG but that's another thread.
BDDI had to go last so everything came out of the XLR. I played around with positioning before fixing the board down and found no obvious compromises and could always dial in a chorus sound, and any other, I liked (subjective I know). I actually preferred the BDDI last as it gave a unified effect over all of the others. I don't know of any demos but that was my experience and all good.