I have a problem with the word 'Kit'. Kits in other fields, such as model cars, boat, etc, conjures up a certain expectation. But it's different in the longrifle culture.
The purchaser's concept: he might think of parts that all fit together, and just requires finishing. Much like a model airplane, very little other than a little trimming here and there, some finishing, for a very nice result.
The manufacturer's concept of a kit: a set of parts to make an historically accurate representation of a long rifle. Brass parts need filing and polishing, barrel might need some positioning thru further inletting, lock that needs inletting, polishing and tuning. Stock needs to have some wood removed to slim it down to correct proportions. A kit like this can easily be 100 hours by a competent builder. First timers can add some hours of study and practice.
Every makes assumptions. The purchaser sometimes thinks he's getting something that will go together in a few days. The manufacturer has always supplied his kits as a parts set, and he assumes the builder has the skill level to assemble it. Neither one is wrong, but it is good business for both parties to investigate each other about skill level and expectations, so that neither one gets disappointed. A happy customer will do return business; that's good for both parties.
Blah, blah, blah....I should just be quiet now.