The blimp is back

It has almost been a year since I was working on this little toy. I’m going through my inventory and finding old projects here and there and packaging them up if I can. The blimp had a lot of promise. People come by and touch it, and they get to control where it goes. I remember a few beta testers liked to set on the blimp even if someone else was driving. I set the blimp up to display a few messages from a configurable notecard as well as setup a home location and how far the blimp may travel. I thought I had it all ready until I couldn’t control the height any longer. I was able to control it most of the night until I was ready to package it. What gives? This problem seems familliar.