Well, after playing with them quite a bit, I think I've actually managed to get two out of the three trip switches working properly (at least mechanically to the naked eye, as I have yet to switch the game settings over from freeplay back to coin mode). I may eventually revisit the third switch, which was the one I tweaked too much and broke, but for now, I have the two working ones placed on the ends accepting quarters, while the dollar mech in the middle is simply blocked by a replacement red Williams coin entry plate from Marco, which looks pretty nice actually.
Now, it's time to move onto two new problems I've discovered:
(1) The lamp inside the pop bumper that's not working, even after replacing it (didn't realize there was supposed to be one in there, until I went to replacing the broken cap). To my novice eye, looking under the playfield, it looks like there should be two wires coming out for that particular lamp and one appears to be broken/disconnected. Probably not the easiest fix and would require my questionable soldering skills.
(2) Didn't realize it, until I went back and played BK on visual pinball, but I think the speech is a bit messed up on my BK machine, as there appears to be some missing words and/or phrases. I've read a little bit about it, but it seems like this could be a real ---smurfette--- to actually diagnose what the actual problem is...board, rom's, etc. Wish there was a quick fix, along the lines of replacing the entire speech board, rom's and all, that was not that expensive, but then again, I must be living in a dream world...