Id never seen a 36 Gravely hydro WB before then noticed this on Ebay last night: http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&ih=006&sspagename=STRK%3AMEWA%3AIT&viewitem=&item=160117335330&rd=1&rd=1 Is this thing a dual hydro? Does the deck height adjustment work pretty easy, or is it heavy and awkward on those? Are parts still available? What about the long length, heavier to tilt up over a bump, structurally weak? Thanks Ron.