MOTM

Here is the problem: I have seen the future and it involves LOTS of
modular synth bits.  And regardless of who I read aboot, they say they
have run out of space for their rig.  Also, the future includes +5V. 
Really it does.

So here is the plan:  start nice and easy and get something up and
running at a reasonable cost, hopefully using parts that can be
cannibalised into larger designs in the future or sold off without
loosing all of their value.

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?

PLL, BFG