It is an awkward situation.
I started to build a wheellock with the intention of adding to my FAC firearms. A long project I want to take a long time on, probably years, so a variation too early would be pointless because my FLO likes to see the slot filled in the lifetime of my FAC.

So at what point does it become a firearm, is the trigger or parts of the lock component parts. Talking to someone who had built one before I was told not until the vent is drilled does it become a firearm.

We can buy kits from Track of the Wolf in the States but have to be sure the breech plug is not drilled otherwise theres all sorts of paperwork involved.