I agree, I’m flying a hot-rodded Quest Courier (BT-55 extension tube, one-piece recovery, altimeter bay, 29mm mount and Labyrinth system, beefy stand-off for 1010 rail buttons, Estes retainer) and the E30 is a bit too much impulse for the 1000ft ceiling at the home field, but the E26 seems to make it prone to weathercocking and I suspect that the issue is the flatter thrust curve. I think getting the initial spike down to about 75% of the E30 with the thrust profile and duration otherwise similar would be a winning combo for that rocket in particular. I don’t have any particular propellant preference but I suspect that some kind of Blue Thunder or Redline ought do it.
As always, take that how you will, I’m just one guy with one potential use case.