Rob,.... do Jim's kits come with the barrel already drilled and tapped for a vent liner?
yes, for a chambers white lightning that's supplied.
Wow,.... Jim has those kits down to a fine art, and the inletting looks impeccable. 
there will always be some amount of inletting required.
the Most Important thing for a flintlock will always be how the barrel fits into the stock, from the barrel channel to the tang and bolster/breech.
the absolute MOST important relationship in a KIT gun that's predrilled is how well the all the holes line up. that's almost impossible due to fluctuations in wood and CNC work, where if yer off a tad then things just don't line up.
when the barrel is homed to the stock and secured with the tang screw to the trigger plate, will the rear lock plate bolt fit/align with all FOUR holes - offside lock plate, left side stock, breech, right side stock? the actual lock plate has no holes and requires 8-32 drilling and this is a very good thing.
NOW, will the lock's pan allow the already secured barrel meet the touch hole properly? to me, that's the prime goal of securing the barrel and lock.
the first problem i'm up against is that with the barrel properly inletted, the tang bolt and trigger plate secured perfectly, the breech tang's rear lock plate bolt hole won't align with the stock holes. i wish that i was allowed to drill this hole, rather than having it predrilled.
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with the lock plate temporarily pushed in (there is inletting work required), the touch hole appears to be in the right spot ...
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