PushGlo here. Nice and small. Figure I have to walk up to the heli any way.
Now if I had a traxxas easy start on there LOL.
I once did see a 3d plane guy at our field that fixed his tail heavy issues by having a starter up front. Really freaked out the plane guys when he was doing rolling dead stick landings right at the ground, and then pulling up hard while the engine restarted. It added some weight no doubt, but it would be sort of cool to be able to cut and restart engines at will. No room on a pod and boom heli for that though. Scale heli maybe.