Pre-laminating transom core?

[Dave Hirshberg]

You're ok laminating the core material together then cutting to the transom shape, but the outsides of this core need to be raw to adhere well to the boat itself. As far as pulling the laminated core against the transom skin, do yourself a favor and borrow big transom clamps from someone. Oh, and don't bother drilling any thru bolt holes because no matter how well you measure they will be off when its all said and done.
just my 02