I did a dry fit of my keel boards tonight before I glue them up. And I'm confused...the plans state that from the stern blocks to the stem keel joint is 154 3/8".... It shows the point of measurement at the stern but not the other end..so I must be measuring the wrong two points..I come up with only approx 151"! Panicking a bit....my stem is 1" past the first station mark like it supposed to be and my keel should be exact as well..I followed all the measurements . Other builders run into this?