Devil's Advocate
Now you are showing your age - from the mid-to-late nineties this was an automatic function giving Navs even more chance to notice the wings were in the wrong place
By the way
the wings can be swept to any postion, but normally used in 25(forward) 45 (1/2) or 63/67(back)
it is also a shame that the "Fin" was never cleared for all sweeps as Barnes Wallis had intended with his Variable Geometry concept. Did you ever watch the SEP bars move above the horizon when you moved the wings between 25 and 45 at high subsonic cruise at medium to high level (well high for a Tonka!) - the TPs and Eng Authority have a lot to answer to!
I here you on 35wg, though
LJ