It was a small hydraulic leak. maybe a couple of tablespoons!
It was actually an engine oil leak thru the oil breather system. A blanking plug came loose in the oil/air separator. Because the breather in the -200 goes into the exhaust instead of out the back of the nacelle like the -100 dump oil into hot exhaust = smoke on go, just like the display planes.
Engine lost about 7 quarts of oil.