If I had 100 comp on any cylinder and it is more than 10% lower than my highest---bad cylinder/s.
With only 100lbs comp--I would wonder what type of freshen up your mechanic did--almost sounds like some ports may hooked the rings from burr's.
I can tell you with a injector out on my engine--I lost about 10 mph on the top end--that is a engine rated at 218 at the prop.
Good luck--but the news you are giving is NOT good.
Bummed for ya.
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 88 V-20
200 G2
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