Interesting discussion, and i agree with Pinball God - if it plays well i don't care too much. Now obviously i am currently building a MM from an NBAFB to keep - however if i was to sell, i would be telling any potential buyer of its origin.

I also have a query as above - What determines original.......

Once you put a LED in, its not original

New cab decals, not original - but worth more than one with a marked cabinet

I don't have a strong opinion as i just enjoy repairing and playing pinball, as long as its fun, i don't care too much!