Since it is kiln dired boards, it is ready to go. I was very tired when I wrote the last time, so didnt think it through as I should have.
The best advice is to go very slow, and don't violate the back of the bow (the side facing out, vs. the side facing you, which is called the belly). Keep it on the wider side, since it is a "white wood", and wont have the same properties as yew or osage. Make it at least your height in length. You can do a full compass bow that bends in the handle, or a stiffer handle, say, 4" to 6" long, with fades right out of the handle and an eliptical tiller. Generally, with that style of bow, the last 6" to 8" at the tips bend very little or not at all.
And whatever you do, don't draw back the bow past whatever your intended draw length will be. If you wish a 50 lb. bow at your draw length (say, 27", which is mine), you want to keep from drawing back past 50# at all stages of tillering the bow, which is the term for inducing the bend, not the stock of the crossbow as we use the term tiller here.
You start by defining he width of the bow, handle placement and fade placement, then limb length, then begin tillering, so you get an even bend on each limb. Once you get an even bend in a process called floor tillering, which is pushing on the bow while holding one end against the ground, you put on a long string, about the length of the bow, and begin drawing it that way with the long string, remove wood as you go along with rasps, files, or scrapers, and gradually get it bending evenly on each limb at a longer and longer draw length. At some point, you want to brace the bow to the correct string height (around 6" for me), and continue wood removal until you hit your intended draw length and weight.
I highly recommend another great web community, Primitive Archer. Free to sign up just like this site, and a wealth of expertise in all aspects of making bows. My screen name is Dane there. Folks there are excellent, there are a lot of buildalongs, and they are from all over the world, and very free with knowledge nad assitance.
Paleoplanet is one other web community I love, and it is much like Primitive Archer.