Ok, just to update. Everything's now working. The problems were, a wire on the left ramp opto had broken, but with just a cursory glance and not really knowing what I was looking for I missed it. This apparently blew a fuse, and since I couldn't find my multimeter and not having any previous experience with these types of fuses I assumed (wrongly) that a visual look at them would suffice.
Jay from M&P Amusement came out and tracked the problem down, re-soldered it, replaced the fuse and to top it all off installed my Cliffy Protectors for me all for no charge. Plus I got a few hours worth of pinball school, which for a complete noob was really great. Now I actually understand more about what everyone was trying to tell me.
Next up, installing my topper from Laseriffic and the Lover Never Dies LEDs from cointaker and then have to do some color matching LEDs in the translate.
Oh and if anyone else is new to pinball like I am, have a working multimeter handy and learn how to use it.
Thanks again everyone who threw in some advice. I hope I don't have any other issues, but when I do I think I'll have a bit more of a clue now on how to address them thanks to you guys.