Thanks for all the inspiration! These are just brilliant. I sadly don't have too much Castle Steck pieces yet, at least not enough to attempt some of these wonderful customs. I'm going to keep adding to my collection though by picking up sets through Ebay auctions.
It seems like some of the pieces in the customs pictured are only available in rare older sets.
Another thing I noticed was that they appear to be using some of the western fort steck pieces, which is really cool. I wondered if those would work with the castle pieces.
Thanks again for posting all these, they will definitely inspire.