Electron Beam Model Rocket Launch Controller

Have had it 4 years, lost it in a field for a month once, rained during that time, found it later on, still works great!!!

I have and electron beam launcher. It does work, but not well. I wanted my 5 yo son to launch the rockets maiden voyage, but the safety key is too hard to push down for him so i had to hold it down. The launch button for whatever reason took at least 20 seconds to ignite even an a-series motor and he thought he was doing something wrong.

This unit serves as my range box backup for B6-4 Field launches. It does everything well, but is not as easily adapted to one hand launching. It can be done, but it strains the limits of my coordination to their limits.