Hi,
I've had 3 test sessions so far and we are getting the bugs out slowly. First, the hulls are dry inside, and they seems to move easily through the water. On Saturday Kevin and I were both on the boat and we took turns pedaling while the other tended to some issue. Then while I was pedaling Kevin took pictures and video of the wake at various speeds. Unfortunately I couldn't seem to get the GPS on my phone to cooperate so we don't know the speed although folks along the shore were complaining that the wake was making it unsafe to swim......
We tried several props and it does make a big difference how much the boat and cargo weigh. The 16x14 APC pattern prop was just too aggressive with two people on board. The boat seemed to move right along but I could not reach a cadence I liked and still keep that up for an hour with two people on board. Now if there were two drive units we would be going faster and that might have worked. In the end we were using a 16x12 prop that had been previously cut down to about 13 inches. It was a bit light for a single rider but good for two. I bought a few larger props but I won't use them unless I back off on the gearing. At some point I would like to tow the boat through the water and see what the drag is at different speeds.

I dropped the frame down about 5 inches and could go a bit lower but I don't think I will. It's great for flat water but too low for white caps I expect. I will keep the original frame extensions and make 4 more so that I can switch if I have to.

On Sunday Jane and I went back to the lake and did a bit of a tour. The issue of dragging the prop prompted me to take another stab at supporting the shaft which seems to work quite well. Basically I changed the support so that the only restriction was to keep the prop tips from falling more than 6 inches below the surface. Other than that the shaft and prop came move where ever it likes. At the shore I got Jane to pedal while I held the boat and the drive shaft bowed out enough that the prop moves ahead almost a foot! But it seems to be okay at this.......... We went out around some islands and back with the only issue being that I forgot to tighten up one of the bolts on the rudder bar and the forward end came off so it bent the tie rod at the back to about 90 degrees. But we borrowed  a bolt from something else and wade it back fine.

Pictures to follow and maybe video if I figure out how to upload it.