You might consider adding a charge port to the plane. It's a small plastic bit that holds the charge lead that normally floats around inside the plane, and allows you to check the battery voltage and recharge at the field with out taking off the wing.

This is what I'm talking about:

http://www3.towerhobbies.com/cgi-bin...&I=LXE965&P=ML

Taking the limiters off the high and low speed mixture is probably a good idea eventually, but if the engine is running right, then it might not be necessary. It will depend on the weather, your fuel, and other factors.