I recently bought a very clean and perfectly functioning 2.8D and need some advice about the screens. The viewfinder is fixed with four screws and not the quick detachable type of the later models. There is a matt glass screen with a grid and on top of that a plastic fresnel that is in pretty poor shape ... when outside any light that hits the fresnel causes it to flare severely and the camera becomes very hard to focus. My question is ... what is the best screen solution for this camera. Should I just replace the fresnel ... if so where should I look to buy one? Thanks in advance.