Most of the time, he just rebuilds the engine you send him, unless it is completely trashed.
100 is not to far off, might just be some scored rings. Get the oil and filter changed,fire it up, and see what the bottom end sounds like. If things are nice and quiet, the bottom end is probably good. let it cool, and do another compression check on the lowest cyl. I'm more concerned with the water being in the crank case, than being overfilled. With a four stroke, over filling the crank case makes higher case pressures that can blow seals, and push that liquid into the intake system via the vent tube.
Pull the exhaust and manifold and see if there are any signs of leakage. should be apparent.