It's coming together and I'm almost there.
I've been working on my brother's NGS for a while now and passed a landmark leap this past week. Got the MPU to quit locking up. I've cleaned it all up and replaced broken parts - general shop job. It did clean up nicely, though the playfield has the standard insert wear on the bonus inserts "V" tree in the middle. It's cleaned and waxed so maybe that will minimize future wear.
I was going to get into burning my own sound rom to replace the one that came with it (it was for a different game), but that didn't work out so I ordered one from J. Wart and it arrived yesterday. It works too!
It's a great art package, but the game play doesn't really grab me. Sure it's fun - it IS pinball after all - but not "ground-shaking" fun. I won't mind handing it off to my brother and reclaiming the space in my living room.
Now I just have to troubleshoot a few feature lights that don't come on and the thing will be done. Woohoo!