I would like to make a Reflex De flex caul for a selfbow with sinew backing, I'm make my 1st Osage bow now and the bows I want to make will range from 55 to 62 inch. I made a steamer out of PVC (it works awesome) the plan is to steam it and set it on the caul for a few days or so. I really need some help I don't know anything about cauls and don't know where to start. Thank you for time