A bow to the neck... I've heard about it many times before, in fact my current L2K had it (1st 1 I've experienced) but I was able to repair it myself. My truss rod was maxed out as well,
so I loosened the truss about 5 full turns, clamped the neck down, then placed a clamp on the center of the neck (frets down) and applied force with the middle clamp.
I had to do this 3x so far and it's a lot better but still not quite perfect. I consulted my local G&L dealer (Murphy's music in Huntington NY) and they advised the only way to make the
fix permanent is under heat, so I'm going to try it again but with a hair dryer on it this time.
I sent my L2KE neck to Warpedneck .com (webpage), the shop is in Texas. When I bought it there was a twist and a fairly bad ski slope. Pretty much unplayable over the 12th fret. They were able to get it almost completely straight and now it takes a really good setup with medium low action. It has held so far and it's been 6 months. I would send it to them was it really didn't cost much and they do this type of thing quite a bit. I am not sure a hairdryer is going to give you the results you are looking for.
As a side note on the 3 bolt necks, from what I understand the ski slope is related to over tightening the 2 bolts closest to the headstock so everyone should be careful not to turn those to tight.