I've seen it done with Dragon's Lair and that was in the Restoration section. The guy painstakingly restored the cabinet but decided to use Daphne to emulate the game since Laserdiscs were hard to come by.
There is a huge difference between finding original
hardware for a KI and a Dragons Lair.
And this fella just mentions that it's "not working" with a hint that the monitor doesn't work.
So is all the original hardware there or not ? (boardset)
The monitor should be easy enough to fix...... and a boardset easy enough to find if needed.
Number one thing that goes out on these is the power supply.
And typically they just get weak and need turned up a hair.
So, question remains...... how complete is this machine ?
It's still really all a matter of opinion on what you do with a cab.
But MAME something that is
easily "restorable" and you tend to loose some support here and there.
I'd even go along with the multi-KI's others have built......but there's at least original hardware in those that I've seen. (JAMMA switchers)
My $0.02