Blackwater Brook Rifle Works: Zoli Zouave Musket Refurb pt 1, the low point

Traded a enfield no 4 mk 1 for this, it looked really good on the outside but when I got it home and started looking it over better I was kinda disappointed, the list of things that need to be fixed grew really quickly. it was dirty as hell even though I was led to believe it was clean, there is rust on the screws and some under the barrel, the brass has some corrosion on it, I bought it knowing there was a half cock problem, but i'll get into that in a bit. there is something in the barrel that traps the jag and I had a hell of a time getting it out, I didn't have my bore light so I haven't looked down on there yet, but im not exactly sure what i'll find. and the wood needs a proper stripping and refinishing in a proper color and oil finish.
now the serious problems
When i took the lock off I expected to find a geometry problem with the half cock, but what I found was much worse, a overly poor hardening job on the teeth let to the outside edge being overly brittle and breaking off and then some years of shooting if have rounded that edge off and also wore the lip of the seer, not a overly hard problem to fix really, i'll just cut a new edge and its good as new...not so lucky, when I was putting the mainspring back in to test my initial filing job i heard it ping, and on inspection there was a crack in the mainspring right at the bent...that spring is fucked, it was poorly shaped too, the leaves of the spring actually touched about a 1/4 inch down the length leading to some odd pressure at the closed end, i expect this led to its final demise, after about the 3'rd removal the poor spring had had enough and killed itself, with that fucked, i might as well bite the miniball and get all new parts to replace the worn ones. that will give me lots of time to refurb the wood.

Im starting to think i got the crap end of the deal stick though