I've been slowly working on the stepdown hip truss set. Its been a bit more complicated than expected. I've also decided to make it auto select the common truss type by span but also allow the user to manually select the common truss type as well, yet another level of complexity. In addition I would also like to enable raised heels which again adds to the complexity of the required logic and amount of code required to make this work.
The user will be able to select the hip setback. This is usually 3x or 4x the truss spacing (ie. 6ft, 8ft with 24" o/c truss spacing). I could restrict this to some multiple of the truss spacing but I think I will leave it completely open ended for the user.
Once I have the initial module complete I will then add into the advanced options the ability to use a drop-in purlin frame.