Mate what you need is more pinball machines, yes you heard me. The thing is I have 3 machines, been working on my Stern Galaxy for a few months now. I don't even know if it will go when I finally get the boards back in and coils replaced.
But the thing is when I get sick of this machine I just fire up the Gottlieb Wipeout DMD, it always runs, never seems to have a problem (so far).
So you always need  to have a backup pinny, one that sits there faithfully waiting for you to play it. Then when you get the shits with the satanic machine you can come over to the good side for a while.
Anyway, just my 2 bobs worth

oh yes i have a second machine that works without a hitch, its bloody great and never has problems, just happens to be the machine in question is for my shop, and is spending more time out of order than working, this thing is a son of biatch lol