I have an update, for those interested. I took the advice given and built out the side plate even more. Had to go out almost a 1/4" to get good arrow flight (with the arrows I have available). But I was getting GREAT flight, and hitting what I was shooting at (I guess I need stiffer arrows!). I have to be carefful about dropping my bow arm, too, but when I hold steady, she sure shoots good.
Pinelander, I can hear a low "thrum" from the bow, as far as noise, but I can't imagine it being much quieter without be silent. I have cat whiskers on it, and the string material is TS-1 plus, I believe. The quietest string material I have found.
Thanks, all!
Mark