Hi, everyone! I now have my first Gretsch. It's a lefty, 2015, 5420 that I had the Bigsby put on it, of course. My question is, what are the potential weak spots on it? I've had some tuning issues with it and I don't know if it's due to the stock bridge or something else? Also, are the pots cheap on this guitar? No problems so far. I do love my new baby, just wondering what other people have changed out? Sorry I haven't read all the posts yet. Wow, and this thing is really sensitive to humidity changes!