everyone is probably going to think i'm retarded, or that this isn't possible. but, i want to try this anyway. i have a nikkor 28-100/3.5-5.6 G that has a broken mounting ring. first off, i want to switch out the plastic ring for a metal ring which will be really hard, but theoretically possible. i might not get the metering to work, or the AF, but that's fine. the other thing i'm going to try is opening up the aperture to F1 (haha, yeah - a 28-100/1). i'm expecting this thing to turn out either really soft and full of CA and some distortion at wider focal lengths, or really sharp and full of CA and some distortion. this lens doesn't need to work like an L series, or one of nikon's higher-end zooms, i just want to see if i can do it. what i'm having trouble with is getting the mounting ring off. the screws will not turn. i'm assuming they're glued. and i'm wondering, of course, if anyone has any experience with either experimental or certified lens repair and could shoot me some pointers. thanks in advance.