First, I like that your certifications were done on the type of rockets that you enjoy flying. That's how it should be done.
As far as waiting while someone assembles a reload, I've done it many times. I don't mind it - it's part of the process. Pull up a chair next to me, I'm not going to stare intently as you do it, but I'm there if you have questions, I'll look over periodically to see how things are going, but I'm also doing something at the same time. The purpose is to make sure you do the assembly, not to watch over you like a hawk.
-Kevin