Looks like a bunch of jiggery pokery to me.
Not sure my Switchblades are Switchblades.
I set them up over the weekend, using marks on one fork leg to get it correctly relocated and then used a brace, hub and other gubbins to get the second leg installed, measured A to C and got exactly 390mm.
While I was doing all this, I noticed the drop outs have Lung-I cast into them. I can't find any pictures of Lungi forks that look anything like mine. Not that it matters, they are installed, appear nice and square and have a temporary wheel currently sitting in place.
Should be picking up some more wheels and a headset this week, so pictures of the project will follow at some point.
Thanks for all the photos.