I just moved my Dursley 6/1 with heavy flywheels and small generator, using 3/4" pipe for rollers, a small trailer, 2x4s for "railroad track style runway" and a small come-along. Took about an hour to get up on the trailer, 12 hrs on the highway, and 3/4 hr off and along a 50' flat broken concrete driveway into the garage.
Went without a hitch except the one time when I hit a large bump and my wife (who was following me) radioed that my engine had just jumped about a foot in the air
And yes, I had it tied down 16 ways from Sunday to prevent it from tipping, going forward, back, or to either side, I just didn't think it would jump straight up!
Stan