I'm having trouble fitting my bulkheads.  Measuring from the bow to the centre of the bukhead seems easy enough, and setting it 90 degrees to the #1 strakes is fine, but should it be 90 degrees to every strake all the way to the gunwhale?  I presume this is so, but I wonder whether I'm making this overly complicated?  In addition, the # 1 strakes want to pull apart (I haven't glued them and am simply dry-fitting the bulkheads) when I fix the bulkheads securely with stitches.  Any tips?  Thanks