Now that I am active flying again it is time to mod my DynaTron Starter. I have been using a lawn mower battery for my starting needs. After seeing what some of the other pilots were using, I decided a mod was in order. First I made a cardboard pattern to determine size and shape. Then I cut a sheet of aluminum flat to size. I decided to rivet it together. Trial fit of batteries. Fit battery box to starter. So far so good. I thought I might have to move the starter to another location in my flight box. A trial fit in the flight box showed it could still fit where I keep it. No interference with my transmitter. This mod is coming along good for my needs.