This reminds me of another story..... Back in the good ol days when boat builders & skiers were real men & didn't have no stinkin computers to test boats with I lake tested boats like this: no motorbox, no shifter, complete steering (if only one tester onboard) Hull & deck pinned, fuel system complete, no interior. Back boat into water w/o launching, pour a couple ounces of gas down the carb from a bottle, be sure trans lever is in neutral, crank until starts. Look for fuel leaks, water leaks, fire, if none present proceed. Manually shift trans lever into reverse by hand & back into lake, shift back & forth from neutral to forward & shift weight in back of boat to steer out of the launch area. Assume the testing position, rearward facing, butt on passenger seat DIRECTLY in front of the pylon, shifter left in forward, looking over your shoulder to see where you are going. Left hand on steering wheel, right hand on custom wood stick with wire hook on carb. throttle arm & slowly apply throttle while looking over shoulder. When 36mph is reached watch the wakes for symetry, if balanced wakes can be acheived by moving my shoulders only, we are good to go, if I needed to move my butt over port or starboard to acheive balance the boat goes back to the shop to adjust the trailing edge of the hull bottom. Gelcoat was added to one side or the other to correct this, usually with only one try. Then back to the lake to do all over again. Of course life jackets were optional but they made a pretty good seat cushion instead....oh the good ol days....