I'm also flying a electric 110. I'm using the stock 110 crutch but you can use the Corona crutch without doing any modifications to it. To me it's much more fun electric than glow. I'm getting 8 minutes of flight time using a 8 cells Panasonic 2000 Nimh pack. For the first 1-2 minutes of flight, this set up is giving me more power than the Norvel engine!!
Here is my set up:

Mega 16/15/3 brushless motor
CC Phoenix 25 amp esc
10 tooth pinion
2-6 dots grip
hitec 535 receiver
HS-81 servos
Heli-Max micro gyro


Let me know if you have questions............Sylvain