The Wersi Abacus Duo Deluxe features a detachable upper keyboard that you can take out for gigs.
[img]http://us.f1.yahoofs.com/groups/g_8143879//Yahoo!+Photo+Album/abacus-white4.jpg?grw0pHAB48gbsDuf[/img]
Cool Man
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Larry Hawk
Technics For All