Aurora with Arizona regulatorThis was my prototype Aurora back in 06 with Arizona regulator set up that I was flying. Fit nicely on the side. The canopy is really skinny so I put some more protection on the wires going over the side of the tray to the regulator because there was a chaffing possibility for the wires rubbing on the canopy.
The receiver and battery barely fit under canopy so the strong box holding the 611 amp had to be mounted on the underside of the tray. The Arizona didn't fit under the canopy either on top of the radio tray and it fit nicely on the side. Using a amp-less gyro like a Spartan, you can put the regulator on the underside of the tray just fine too. Hope this helps