I have an OM 1000- totally love this instrument- very clear and dependable on every fret- no worries about humidity here (big deal for Minnesota) and is a BOOMER.
I have the OM, and I have friends who are married who have the WS and Jumbo- with all three of us playing these, it is such a wonderful sound.
I do not have the experience with the A series- but I know that the Advanced series has an adjustable truss rod, but the back is a bit different.
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Eric
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