Well I've just glued to ~3/4 long sections of #286 H beam to my current Nova Payloader. I'll see how it works the next time I go fly. This model has 46 flights on it so far, all of them with at least one altimeter aboard, so I have a pretty good baseline from which to observe performance differences. Flight have been on everything from an A8-3 to a D16-6, though most have been on Bs and Cs.
I'll have to do a couple off a rod just to see if the rail guides themselves make a significant difference before I fly from the Makerbeam rail.
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Since it was nearby, I grabbed the model I initially flew the micro buttons on and tried them both in the rail. The H-beams slide more easily but they both bind if things get off axis, though it has to be a little further off with the H-beams. It will be interesting to see this in action on the field.
(The older model was retired after 75 flights. If you look closely you can see the paint bubbled up at the top of the motor mount/LE of the fins. That's what putting an Aerotech D10 in this model does to it. It got really soft there so I decided to retire it some time ago.)
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