A quick note to myself regarding tuning.
There are three trim pots on EH 0400-1B.
The one attached to the PITCH BEND feeds voltage to the other controls. This can be used to set the PITCH BEND interval. Some iteration is required.
The TUNE trim pot is labelled and accessible through the front panel. Just next to this is the INTONATION trim pot (could be called SCALE).
The INTONATION trim can be used to directly tune the high note, while tuning the low note with TUNE. With just a little repetition, good scaling and an perfect octave pitch bend should be attainable.