I have made up several sets of lam birch arrows. My advice is to straighten and seal them soon after you get them. If left to sit around, they sometimes develop bends that are hard to get out. Hook straightening will take care of most everything. If you get something more stubborn, use heat and hand pressure. Nock placement shouldn't be an issue, but I align mine across the glue lines, just as if they were regular woods. You will probably need some sort of disk sander for grinding the nock and point tapers as the pencil sharpener types aren't up to the task of the harder woods. The sander does a much better and more precise job, anyway.
I like the lam birch for a good, durable, heavy arrow, and think they shoot better than the other hardwoods I have tried. Good luck!