I'm not familiar with the aerotech mustang so I cannot comment on that combination. However, there are 3 of us at my field running the Evolution 45GX with the BCM wrap around pitts. All 3 engines seem to produce similar numbers ... the only difference being the prop chosen for the flying styles and airframes. We did a tach comparison against a well tuned Brison 3.2 with both engines swinging an NX 23x8 wood. The Brison's numbers were 6800 and the Evolution was 6500. The Evolution only had 2 tanks thru it at 30:1 so I expect it to actually perform quite a bit better after breakin, 40:1 mix and carb tweaks.

I myself have about a gallon thru mine spinning a Biela 22x8 at about 6650 and pretty much tweaked on the needle settings. I was running an NX 22x8 wood and getting about 6750 rpm (I was surprised at the rpm difference between the NX and Biela).

The 45GX comes with the 6 hole hub but only 3 prop bolts as well as the nut with prop nut spacer. I do not run the prop nut or nut spacer and added flat washers and lock washers to the 3 prop bolts. The others run bolts and nut ... but I didn't want the added weight

I have not seen the new ignition and have only read what is available here on RCU. preivers is probably the best person to discuss the ignition options with pros and cons.