GREAT STUFF!!
I just recently started Malifaux and love to convert. At least that was what I did before Malifaux, I've started doing it with some sorrow models from pandoras crew, but after researching a bit, i found out that conversions aren't as appreciated in Malifaux as they are in other games.
I read somewhere that 66% of the model needs to be the original sculpt. Otherwise tournament organizers may disqualify you. Is this something that you have encountered as well? Because some models have (in my opinion) bad poses or details that I dislike. And in the case of posing the difficulties are when you create a new pose you have less than 66% of the original sculpt. You might keep the head and weapons but the "core" would be exchanged.
Your work is much appreciated, keep it up. You have inspired me!