I found a local lumberyard/sawmill that has some ipe boards available. I plan on using it to make a bamboo backed ipe bow. Probably between 68 to 72 inches nock to nock with 11 or 12 inch handle section. I want it to be between 45 pounds (or maybe a touch more) at 28 inches. Through other peoples personal experiences with this wood combination, what would be the ideal bow length limb width and starting limb thickness and tip thickness and width? Any help is appreciated.