Boom, I just made my first 33cm contact, almost exactly 7 miles apart with at least one hill in between. He has a proper yagi and 50w and I was using a PCB log periodic about 4" above tabletop level, in the house, running maybe 800mW from a 144 to 903 transverter.
CW was easy. He gave me 579, I gave him 599. On SSB I could hear him pretty well but he could only tell I was transmitting, not what I was saying.
It's safe to say his antenna was doing the bulk of the heavy lifting.
Next up I'd like to get up to a higher vantage point with a clear shot from farther away.