A Mod of Macs?

I run a 9.9 hp Yamaha 4 stroke long shaft high torque engine with "power prop". I can achieve hull "displacement speed" on my MacX of about 6.4 mph on 1/3 throttle. 10 mpg on average or 0.5 gallons per hour at that RPM Setting with water ballast full. If you are not in a hurry, y...

I post this at great risk of criticism from true sailors on this forum. I was looking for a "leisure cruising craft" for an inland river in a deep valley with little or no wind. (Kentucky River) It had to have an efficient hull design, decent interior space and shallow draft for shoals and...