Aaron.i must admit i just ripped the lams on a tablesaw.2 hickory around 1/8-3/16' ea. ,1 honey locust also around 3/16".i added a Walnut wedge in between the first hickory and the locust.it's a couple inches longer than the riser.I also just sanded it and eyeballed the tapers.nothing is too perfect but it tillered out Ok. i had limited tools available .next time i'll get more precise lams made.The riser is Walnut and Striped Maple glued up.
It was my first attempt and a real "Seat of your pants" learn as you go build.It shoots pretty good though.Good luck with your build.