The Homelite 30 on my Ultra Stik had electronic ignition, but I also had a smoke system installed. It flew great.

The Mac won't have the power of a Homelite 30. Maybe if you are comfortable with porting you can liven it up. It's an easy conversion.

AV8TOR

P.S. Forgot to add that no, I didn't modify the firewall. I did modify it in that I put the rudder servo in the tail. That way it balanced fine...