MOTM

>So here is the question:  currently I own or have on order only
>modules that require +/- 15V.  But I can tell that I will eventually
>need +5V.  Is the following solution feasible?  Purchase a 5A Power
>One +/- 15V linear supply now and add a small +5V supply at a later
>date.  Assuming that I connect the secondary grounds, will this be
>electrically adequate to power the inevitable MOTM MIDI-CV module
>purchase?

Yes, I have done this. I have standard issue MOTM-900 power supplies 
in each of my cabinets. In one cabinet I added an additional +5V 
Power One supply along with the MOTM-990 power distribution board. 
The MOTM-900 supplies +/- 15V and analog GND to the 990, and the 
other supplies the +5V and digital GND to the 990. I have been 
meaning to document this on my website but haven't had time. All I've 
got is this one picture showing how it all hooks up:

http://www.tellun.com/two4one.jpg

The distribution board on the MOTM-900 has been replaced by a piece 
of plexiglass that holds a terminal strip and two additional fuses. 
You have to fuse each power supply separately, plus there's a 
redundant third fuse in the power on/off switch. Also, you have to 
connect the two grounds of the power supplies together to maintain a 
"star" ground.