Well I probably don't know very much at all 'cause every guitar is different......but....if I was twenty (or even thirty...or maybe even forty yers old, I'd buy the best D-18 I could find, and ALSO buy any Gibson J-45 with a straight neck, and get bruce Dowd to put the J-45 neck on the D-18. Guess I'd have to put the Martin neck on the Gibson and then try and sell it. Or if the scales were not accurate, get Bruce to Make me a J-45 "style" neck. Sort of what merle travis was smart enough to do in the forties.

Rick