Can they either be produced in packed state, or transformable to packed state within the castle? Otherwise, we lose a turn of movement by having to move them one square out and then pack them.
Today, I moved a treb one square out onto a self-built wooden bridge, but it wouldn't transform. It used up the action, but didn't pack. Later, I moved a packed treb onto a stone bridge as a test, and it wouldn't unpack either, but still it's action was used up.
I have not yet had the opportunity to see if they transform on pre-built bridges, or if they can attack from bridges, but I will let you know when I do.
Also, is it possible to show the range a packed treb would have when it is unpacked with the usual red squares, either both the range of 8 and 10, or just the range of 8. This would make life a lot easier