That's correct, the upper attachment have to be rotated with an certain angle for the Buell frame to slide in (the upper and lower attachment can't be paralell as shown in the picture).
I noticed that the Buell frame is 153mm wide ant that means (as you said Jim) that the attachment has to be directed inwards, but that was tricky to do with the CAD-program
. I will do a more realistic modell this holiday.
Br. Kristoffer