Edit: I deleted my long winded response because I just talked to my friend. I mentioned the cloth being pulled too tight at the corners and to check it with a straight edge months ago. He responded that the facings looked straight. I assumed he actually checked them like I recommended. He did not. Also, I thought he told me he had new cloth put on the rails to make sure this wasn’t the issue. Apparently, I misheard because he did not do that either. I finally got him to reach out to Glen and what does Glen say? Put a straight edge on the facing and check it. So my friend does, makes a video of his facings, and sends me a message saying, “Didn’t you mention something like this before?” Yes. Yes I mentioned exactly this before.
All that being said, it doesn’t look too bad to my untrained eyes. I don’t know that the tiny amount of bow that his facings have would make it play like it does. I told him to send the video to Glen. I think I’m done trying to help. He’ll figure out whatever he figures out.
Thanks for the responses. Sorry I didn’t have my info correct about the situation.