All that is going to do add dead weight to the plane because you are putting a second battery in the plane. You could consider a setup such as this. [link]http://www3.towerhobbies.com/cgi-bin/wti0001p?&I=LXD693&P=7[/link]

This simply remotes the glow plug outside of cowl. You can still use your normal glow driver to start the plane.

Ken