Fri 25-Jan-13 08:17 AM | edited Fri 25-Jan-13 08:24 AM by gfinlayson
Stan, I've just double checked my MB-D11s. Although there is a plastic cover on the top of the grip, which is easily and cheaply replaced if damaged (don't ask ), there is still a sizeable portion of cast metal on top. The casting wraps around underneath the locking wheel assembly, and the steel retaining plate which holds the locking wheel is screwed into it. The portion of the grip top where the control buttons and body connector sit is plastic, but all of the parts which are ever under any mechanical stress are fixed to the metal casting.
I'd offer a word of caution though, to those who hang their gripped D7000s on the Black Rapid, or Sun Sniper type straps - the retaining plate which holds the locking wheel in place (and effectively holds the grip to the body) is only held on by 4 off M1.5 x 3mm countersunk machine screws. I'm not a mechanical engineer, but that doesn't seem a lot of fastener from which to hang a D7000 with attached lens!