: It shouldn't be hard. They need to be plumb which can be measured with a
: level or a plumb bob it your strong back is level. I just made sure my
: stem mold was plumb, at right angles to the station mold its screwed to.
: The plans should show a dimension that establishes the angle of the stem
: mold. If its screwed to the station mold then when the latter is plumb
: fore and aft, the stem mold will be right. Is this any help Paul?

I agree, and would add that when the strips go on they will tend to straighten, exerting thereby a force upward at the stems. They have quite a lot of leverage out there, and can rack the end forms even if they are 3/4" plywood and nailed down tight. If you're using an external strongback you can build the stem form oversize on the deck side, extending all the way to the strongback and fastened to it temporarily. This is less likely to be a problem with Nick's internal strongback, depending on the length of the taper - longer is better.