Scott,
My father is an avid gunsman. He is a gunsmith for a prominent professional shooter on the IPSC circuit and builds tons of customs. He teaches concealed carry classes and also trains police at his home range facility. Even with all this training, he can't own a fully auto without an individual license for each one that he owns. Its not an easy task to acquire the license either. But because he participates in many events where fully autos are required, whether its training or competition, he can always get the license, but like I said, its a huge deal to get it. He has many AR-15's that are not fully auto and only do 3 round bursts or shoot just semi auto, depending on the selector switch, he does not have to have the fully auto for those assault rifles. We shoot a lot for fun as you were stating, and the fully autos are a blast, especially with tracers in the evening
. I will send him an email about your two guns and ask him the specifics of them and what the issues are with them. And if you ever needed any smithing work on them, he would probably know somebody in your area or he may even just offer to do it for ya. He works on a lot of my buddies guns and never charges them a dime.