I have an original series Gallien Krueger RB700. I need to get rack ears for it. I found these for an 800RB. Does anybody know if they are the same? I only find ears for the newer 700RB elsewhere. http://www.ebay.com/itm/Gallien-Kru...865?pt=LH_DefaultDomain_0&hash=item462e56eeb9 Also, it says 1/2 inch clearance on the top for the intake -- would a 2U SKB rack be ok? Do I need a 3U? Thanks for any help.