Thanks to all for the advice & comments.
So I've decided to take the plunge...Just ordered some Aerotech D10-5W and D21-7T single-use motors (and some extra First-Fire Mini igniters.)
Planning to launch my 173g / 6.1 oz rebuilt Photon Disruptor on the D10-5W at the next big-field launch (maybe at the MMMSC launch in Berwick on 8/19, or the next CMASS Amesbury launch...sim is predicting ~920'.)
"Too fat to fly?" Maybe on a Quest C6-3...But should be fine on the Aerotech D10-5W. We''ll see...If it goes well, I'll try flying the Photon Distruptor on the D21 next.
It will be satisfying to finally see this bird fly as it was intended-to. (As opposed to the weak, limping-off-the-pad flights it's done so far on BP C6 motors.)