I am probably in the minority, but I prefer the Bill Lawrence pickups to the Classic 57's if in fact that is what is in my 1989 335. My neck is also dead straight with a low action, more than I can say about many I see hanging in the store racks. I am very pleased, but I am not the original owner so I have no idea what has been changed. All I know is I am not changing anything in mine, and I consider myself kind of hard to please. I looked for years before I bought one, and I am not a Gibson fanboy. YMMV
Re: p/u screws... not sure I understand. Can you post pics (or a link)?
What is the finish on your guitars?
thx!