Family Sassafras Forms & Bulkheads

I've noticed in the Facebook photos of folks at the Family boatbuilding classes, they seem to be using forms to help keep strakes in line as they work/stitch up. Are these available to the general public? ie, those not involved in the class? - and they're also installing the bulkheads as they progress up with stitching, as opposed to waiting until all strakes have been stitched up and pulled together at bow & stern. Seems like a great idea - is that a better way to go?