I agree with what others have said. I would suggest getting "Recreating the American Longrifle". I also find it a lot easier to draw the plan on paper, full size. Start with the barrel. Draw in where the breech plug ends in the barrel. Locate the vent liner in front of the breech plug. Now you know where the touch hole will be. I use a 1/8 inch web below the breech and the muzzle. Some use 3/16 below the breech. Draw that on the plan. The ramrod hole is drawn next, and an 1/8 inch of wood below that. Initally, leave extra wood on the bottom just in case the ramrod drill wanders. If you get some clear sheets you can make a full size copy of the lock you are using. The Track of the Wolf catalog is handy for that. Use the lock picture to locate the lock on your plan. The touch hole defines where the pan will be. That in turn determines where the sear will be. That in turn determines where the trigger will be. If you know the trigger pull, you now know where the butt will be. If you're working off of a photo of a rifle you like, measure the photo and keep the same proportions. You can also blow the picture up to full size at a copy shop. The wrist and butt can be drawn on the plan. Draw all that stuff on your plan. Once you have your plan, you can transfer it to the stock and then draw in where you will actually cut. For example, initial cut down for the breech of the barrel is not made at the breech. Get the book and it will walk you through the process.