I've never heard a K&K - I quite like the sound of an I-beam (so long as the glue does not go funny) but feedback is a problem. I've tried a number of other stickons and they were all shite. If I was going to remove the adjustable stuff I'd probably get a better unplugged tone and volume - but I'd likely go for a Headway Snake (not least in that I have two lying around!)

Oh, I should have mentioned another thing about the install - the person who did it took the neck off (which is at least easy, just like an electric guitar - and then appears to have used a large flat woodworking holecutter to make a "slot" in the neck block which (if it had straight and parallel sides and a straight flat bottom) allows a PP3 or similar to be slipped in. Result - if the battery is a smidgeon oversize or swells, you have to take the neck off to get it out!