a quick build hint for everyone we just picked up the new a700-st17-1-s. when building them, i've found that installing the st13 end first worked best. the st17-1 'cage' is put into a table, and the st16/st13/pin01 assembly is inserted from the top. the st39 'nut' inserted thru the st13 assembly, placed evenly on the 'cage' and slowly screwed on. if you try to force anything, you'll jump the thread. this method ended up being the most predictable for me.