Jeez, please don't use the CH rom.

Aside from that - if you have a 10-opto board, you will need to have a qay to wire the new opto into the switch matrix. (Not sure what kits offer these days..) If you have two 7-opto boards, then you're set.

Should be really easy - just a lot of different things to do. (Drill mount opto, wire opto, mount magnet, wire magnet..)

Yeah. In pre-9.4H versions, it will simply give you a small score (750k?) every time a ball passes the opto. Otherwise it won't be used.

No need - Ted's post on RGP is still there:
https://groups.google.com/forum/#!msg/rec.games.pinball/5exaK_Q8-Pc/70Tl7ojZvBAJ

9.4H also lets you turn off the 'free play' message, and when you do that, it will count credits. (My game downstairs, at the moment, has 98 credits on it. I actually put money into my game.) The only difference is that when it reached '0', you can still hit start.

It was a long time ago, so I don't remember any specifics. He ran some thoughts around the beta testers, and I think the one I do remember everyone agreeing on was to try and fix the magnet toss start of multiball. There was also talk of - on sample games that had the second opto in the autofire kicker - allowing a harder multiball release by storing a ball in the kicker.

Again, (and sorry, this is off-topic. I really didn't mean to go on this long about it..) it was 18 years ago, and I no longer have the emails, so I'm just shooting out what I recall - which may or may not be tainted with time.

Huh, cool! Wasn't aware of that. I hope he reads Pinside, at least. I would love to get in touch with him again.