What you have is called paralysis through analysis. You don't do anything 'til you have it figured out completely. Well the figuring is in your head, and the boat is on the bench. Best way to get those two together is with a staple gun and some scrap, full length strips.

Attach the two sheer line strips (left and right, stapling them only on the end forms, or close to the ends, and on the center form. Then attach a strip that runs to one side of the center (keel) line. Again, staple this only near the ends and on the center form. Slap on one or two more strips between the keel and the sheer line. Again, staple only at the ends and on the center form.

You now have the center form attached to the ends of the boat. If the keel line is straight and the sheer lines are equal in height, then that form is in the right place. If not, then move it. The pressure of the strips will help it to snap into a position. You may need to pull a few staples to be sure it is the correct position. Ifyou do, then restaple the strips once youhave that form in place.

Now the 5 or 7 strips you have running from the center form to the ends provide a cage into which the other forms should fit comfortably. If you see that one form is not touching the strips on one side of the boat, but it is pushing on the strips on the opposite side--well move it to center it. Or check to see if a form in front of it is lifting the strips away from it.

Your final alignment will leave you with your sheer strips in the right place. and a few other strips stabilizing things. As you glue on strips they will tend to lock in the shape, with that effect becoming stronger as each strip is added.

So, build up each side with 3 or 4 strips, let the glue harden, and get into adding more strips. Carefully pull off the temporary strips when you get near to them. You can probably reuse them elsewhere on the boat.

Once you get moving on this the scene changes quickly and you'll see the boat take shape. Sometimes forms are cut wrong, or designed wrong, and they never line up. In that case the strips may simply bridge a gap, or be slightly deflected. The bending of the strips tends to average out errors and be self correcting.

hope this helps

PGJ