I've also heard they weren't exactly dead on from the factory. Good enough tolerances when ramping up production. Mine is a late K1 I believe, when they started to get a little sloppy. Is there a way I can reasonably accurately check it with basic tools (i.e. no frame rack/table or fancy laser measuring machines)?
I did set up a stringline to check front to rear tire alignment (to a ruler, lines at width of rear tire, centered on front tire) and it's out maybe 1/16" at one of four points on the front tire and maybe 1/32 at another if at all, and seems to be just touching the front of the rear tire on each side. That tells me front and rear wheels are in line, but not necessarily that frame is straight? I'd think it would show something if it was majorly out of whack? Anything more I can do to determine if the head is straight or bends elsewhere?
Thought maybe putting a line center of front tire to center or rear and drop a plumb bob from center of frame midpoint and see if it lines up. Or do center of rear tire or frame at rear (swingarm mount?) center of frame farther up, and figure some sort of all thread and cones through the head to see if the all thread points to the centerline established from the frame and swingarm. Not sure, and that's all way beyond what I am capable of doing presently. Insurance is paying out on this so I'd prefer to just take it somewhere and know that's it's done right and all is well when they're through with it. It took me forever to do the stringline and I paying for it with some extreme pain in my back, shoulder and knee. Not sure what the road to recovery is paved with but it hurts.