To the original display question, Neil put the new capacitors in and they are now bright, stable and clear. The new speakers went in and the sound is now twice as good to my ear.
Trim all polished up, speaker panel cleaned and now the coin return fixed. Running out of things to nit pick on this, although i'm sure the pro's can find plenty.
It's also playing very well, my improvement on the factory high score of 251 mil lasted only a couple weeks and i got my arse handed to me last week and it now sits at over 350 mil.
Don'tThinkI'mGoodEnoughToGetTherePunkin