I think you made the right choice with screw into plastic and captive nuts. If you’re not going to take it apart, I think that’s plenty. I recognize people like their heat set inserts and they’re great for panels that need to be removed from time to time but for me, I prefer to screw it and glue it for most things, and captive nuts for the rest.
Elections are designed to be democratic. Political parties are largely unregulated and can generally make their own rules about who they choose to run as a candidate. Remember this next time the Republicans get a big group of powerful party members together to say how much they don’t want a certain orange-tinted fascist to be their candidate, their party could have run someone else. Winning was more important. Similarly, the democrats are well within their rights and the law to have previously committed “superdelegates” or just to skip the primary process entirely and run the vice president.