Sorry if that sounded condescending, I didn't mean it that way, so I will expand a little.
I meant that inletting a lock is easier than fixing an improper lock location. It seems like more work to inlet the lock but in actuality it will probably be less work and faster to completion. I am one of the laziest people I know and that's how I would do it. I would get the stock shaped with barrel channel and ramrod hole only, and inlet the lock AND the trigger myself to save time and effort.
To expand a little more, if the lock inlet location isn't in the right place you have to put it in the right place, and usually that means moving the barrel and tang, after you figure out what directionS and how much, and what else isn't going to be where it should be after you do it. The other option is to glue in wood and move the lock, unless you have wood that matches exactly (you don't get any with a precarve) and are an extremely good woodworker it will be obvious that this was done on top of being harder to refit than to fit once reasonably well. You need to be sure of everything and have a plan at this point. Moving the barrel down and back (if you're lucky it will need to go down and back) so that the lock lines up properly is WAY more work, the tang bending and inletting needed to accommodate the barrel move can get tricky too, and if it isn't a straight tang the result is likely going to suck without a ton of work on the tang. If the barrel needs to go up and/or forward in the stock you will have to use bedding to get it up and forward, relatively simple if you're familiar with bedding. If you can't stretch the tang enough to have it fit properly you have to cut and weld the tang to get the additional length and then refit it after you get it straight again. If the lock wasn't in the right place to begin with the odds of the trigger inlet being right on are low too, and that opens another can of worms. All of the above have additional considerations for overall stock geometry, what it should be vs what it has to be to accommodate the 'fixes' you had to make to get it to work. Yes sir, I will take the easy path on this one, you can fool me once but it's rare to get me twice.
