Probably a stupid question, but just to make sure...

These 3 other VCOs plus the new one aren't all being controlled from the same bus without the CV signal being boosted first, are they I've just installed a third oscillator, and now the one furthest from the pitch CV output is really out tuning wise, but I gather that's because I'm not running it through an A-185-1 module.

Hope that helps,
Zoë.