You have lots of good advice so far on HOW to proceed, but to proceed to a rifle that fits YOU the best hasn't been offered yet.
Since you have other ML'ers, and assuming your style has been chosen I suggest you use one of them to find out the following (in the clothing you will be shooting in);
1.) How far in front of the butt does your cheek land when you're mounting the rifle in the position you will most often shoot it? ( In the butt plate style you're going to use.)
2.) How far below the sight line does your cheek have to be for your eye to naturally align them? These 2 measurements are used to determine your drop at the comb. From there you can go to determine the additional drop you're going to need to get your drop to the butt plate.
3.) How far off the centerline does your cheek have to be for your face have to be for it to be upright when it engages the stock? This determines your cast-off.
4.) When you get fully in to position, does the gun have any appreciable cant or twist to it one way or another? Measure it. That will determine your toe-in or toe out.
5.) Lastly, in a comfortable position, measure what is most comfortable for you to reach the trigger. Most people with a very light trigger are more comfortable with a slightly straighter trigger finger engagement (better fine movement control) and engaging it closer to the tip and longer LOP than they are with a heavier trigger where they prefer a more bent trigger finger, and engagement more in the middle of the pad. This will determine your overall length of pull.
With rifles, because they are mounted and aimed more deliberately rather than mounted quickly and pointed like shotguns are, most shooters are able to adapt to "non perfectly fitting" guns much better than they are with shotguns, where you might only have 2-3 seconds to mount, point, lead, and shoot.
All this ought to be done as you are laying out your blank for your band saw cuts, but BEFORE the saw goes to work.
Take your time with these measurements. Do them quite a few times. Position is important as well. If the gun is intended primarily as a prone position gun the measurements are going to be different than they are for a standing position gun.