The new transition walls are great ...
However - yes, you knew that was coming didn't you - if you have a transition in a wall, in order for it to function properly you can't fix the height of the materials, as when you move the transition, it just moves the fixed sections up ... if you don't fix the height then you get issues with stone sills etc. when you fit the wall to a cathedral. I specifically didn't say ceiling, as I can't make a wall with a transition fit to a ceiling properly no matter what I try.
Is there a way to define the wall so that the lower materials don't try and move (slope) when they are fitted to a gable?