Thanks Tim, I appreciate the detailed response.
I ordered the mustang, retracts and spinner yesterday and Mike shipped it all out the same day. It's scheduled for delivery tomorrow (9/1/16). Mike is really on the ball and gets product out to customers in a hurry.
My plan is to power the mustang with a DLE55 RA and use the provided retracts. I hope the DLE55 has enough power to pull the plane with authority because a 55cc engine on that size plane seems a bit marginal. We shall see!
I have a new in the box DLE 85, but I don't want to cut the motor box and/or potentially bugger-up my cowling trying to shoe horn in the 85. Plus the 55cc engine is less of a thumper than an 85, which typically means less vibration with the smaller displacement engine. I like Tim's dedicated retract battery approach and will follow suit.
Thanks!
Sonny