Thanks guys! I'll post up pics of other projects too. The detailed build thread for the Lanchester is over at weaponsguild.com, along with the FAL, 1911, and some other stuff (same member name).
I did run a few rounds through it, but have not let loose with a mag dump yet. Tried it first with just primed cases to make sure it wouldn't 'slam fire', and that a failed disconnector and 'bolt follow' would not light off a round.