instead of a voltwatch buy a meter to check battery voltage. The voltwatch is installed in a plane and is for one plane at a time whereas the meter can be plugged into the charge jack and the voltage can be read quickly. Some thin and med ca plus popsickle sticks or sticks that look like tongue depressors along with clear tape is good for fast quick field repairs. This plane is durable and lends itself to fast good field repairs. make sure your field box equipment comes with the glow plug wrench and prop wrench. A good idea is too have a first aid kit for aspirin because of sun headaches and bandaids for the inevitable cut or slice from the plane. this can be reduced by lightly sanding the trailing edge of the prop, these things can be razor sharp