Woodhick,
That's a LOT of work for four days. You are to be commended for taking the plunge into scratch building, not to mention taking so many youngsters under your wing.
However, I would like to offer a coupla suggestions to improve your finished gun for your grandson.
I think you would have been better off to leave the stock square until all of the components are inlet.
There is a relationship between parts that determines the archetecture of the stock, and the relationship to other parts. It's much harder to achieve those proper relationships in a precarve, and that is what you now have.
For example, the barrel determines the location of the lock. The lock determines the location of the trigger/triggers. The triggers determine the location of the triggerguard.
The trigger also determines the location of the butt plate, depending on the length of pull.
The amount of drop at the heel and toe of the comb are determined by, not only the shooters body size and LOP, but by the location of the top of the sights. The drop also affects the location of the buttplate.
The buttplate determines the cross sectional shaping of the butt.
The location of the buttplate also determies the location of the cheepiece.
The thickness of the barrel, the web between the bottom of the barrel channel and the ramrod hole, in addition to the diameter of the rr hole and a "little extra underneath" determines the thickness of the rifle at the breech/lock area.
Taking all of those things into consideration, the barrel, lock, triggers, guard, and buttplate should have been inlet BEFORE the stock was shaped.
For an illustration of what I'm talking about, go to the rifle building tutorial on the Member Resources page of this forum.
IMHO, you could have saved yourself a LOT of effort, a LOT of time and achieved better architecture by leaving the stock square until those realtionships were established.
As it is, you will have to reshape the stock after those parts are added.
ALso, holding a square stock in a vise while inletting those components is MUCH easier than trying to hold a contoured stock.
In looking at the thickness of the stock under the lock, I suspect that you will have to reduce that thickness just to inlet the triggers deep enough to activate the sear bar.
If you plan to use double set triggers, the set screw between the triggers should be in a direct vertical line under the sear bar. In other words, the triggers should centered on the sear bar of the lock.
You mentioned that you used "The Art of Building the Pennsylvania Longrifle", which is Dixon's book, if I remember correctly. I haven't read that one, but the best instructions to lay out a longrifle I have seen are in Alexanders' "Gunsmith of Grenville County".
IMHO, Buchele's "Recreating the Americn Longrifle" is probably one of the better books on building.
J.D.