Originally Posted by Rossterman
1. Using two strong magnets, tape the first one on the inside of the hull where the fittings, elbows, etc have enough clearance to assemble.
2. Go under the boat and move the magnet around until it is attracted to the one inside the boat. If location is ok on the underside as well. Mark the spot to drill. I had to go under the boat a few times to adjust locations but worked out perfect.
Can't believe someone hadn't thought of this earlier. Wakemakers mentioned it when i was buying the ballast parts and also mentioned the fact that they have a utube video online showing how to do it.
What a great simple solution to way too much impossible measuring.