The plugs are made from hard balsa,(easy to carve and shape) when I have a blade I am happy with, I then put it in a parting frame same as you would a fuse,wing,or cowl ect. and finish the mold.The lay up is free hand, keeping very close count of lams (blade vs blade) to help in the balance dept.I then close the mold, and vacuum bag with heating pad @80*f.After the prop cures I remove it from the mold,trim and balance.In some cases I will post cure the blade @140*f for two hrs. to strengthen the blade overall. If you do not want to carve a blade, find one close and reshape it to your specs. and then mold it.Either way you will have endless supply of props that are very durable and you can call yours.Hope this helps. Good luck!Rob