Powcon 300sm, Powerdirve I/E vs I/M

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I just brought home a 14-pin 300sm thinking it would plug right in to a Powerdrive I/M sitting on a shelf.  In fact, I think it will-but before proceeding any further I thought I'd check the manual. PD-I/M's manual doesn't mention the 300sm in its list of compatible models; the 275sm and 400sm both are on the list--but not the 300sm.  On the other hand, in the manual for the Powerdrive I/E the 300sm is listed as compatible.Looks to me like the 300sm supplies 120vac on pins 1-2 for feeder power.  But the PD-I/M appears to want 24vac, at least by my read of the schematic in its manual. And that doesn't sound tres flash. Maybe it's just a matter of finding a cozy spot to wire in 24v transformer on the PD-I/M and Bob's your uncle--or maybe there's more to it.  Comparing the schematics for PD-I/E, PD-I/M and the 300sm has been making my head spin. The pin labeling conventions don't all seem to be the same, the I/M pinouts don't look to differ from those for the I/E except for just the voltage difference, etc.Cut to the chase, already: Has anyone run a PD-I/M on their 300sm? How did you wire the system?Thanks very much in advance.