What is the timeline as far as the strats of the 50's and ash vs alder? was it ash for the first couple years, then alder. Or did it go back and fourth, etc. I have no idea, but i DID think all maple neck 50's strats were ash at least till maybe 59. Hows the story actually go. And second, are all years of USA RI's accurate in this regard? i see 57 RI's that seem to be alder when i thought a 57 would surely be ash.