Hello Aleatorylamp,

It sounds to me that there is something that got changed in your "Container" (the MDL file format) rather than the SCASM code. Since I haven't ever done anything with a format other than Aircraft Animator either 64K or 133K, I can't speculate as to what exactly happened.
I know what I would try if I were in your place, but I hesitate to suggest you go that route because with these different MDL formats that I have not worked with, I have no idea if things would really work. You keep having to switch to different MDL formats which is something I have never needed to do more than once.

I would show you examples of what I do when the Flap Angle is something like 60 degrees, but obviously I don't have access to any of my SCX files at this point.

- Ivan.

P.S. You might want to look at what the difference is between a Winglet and a Fence.