I'm indecisive on this, as people who know Bill swear he is a genuine Reading Master. But the price is going from $20 to "about $25" plus asking for mold reimbursement and shipping - this is steep and as noted before the roofs are "shrunken" as well as "not the best".
I am not familiar with "urethane" - the stuff I use is either 2 part epoxy or polyester - I hope its not the pink/blue roofing stuff, that would be crap. This is really starting to look like a "pig in a polk'.
I may go back to a balsa form and heat gun abs plastic over it.