Nice ingenuity! Been looking for a clamping style wall mount, but I can only find side clamp style. With the curved cabinet, side clamps wont hold as well as I want. That has to be my biggest, and probably the only, complaint I have with the 21s; no mounting option built in.
Samsung 51" Plasma E530, Pioneer SC-1222-K, Sony BDP-S5200, Roku 3, Custom HTPC/XBMC, KEF Q600c -center, KEF Q900- mains, Definitive Technology SM450- side surrounds, Definitive Technology SM350- rear surrounds, Custom sub 'end table' with 12" Oz Audio Matrix Elite, Crown XLS 1500 sub amp, Harmony Ultimate and IRule remotes