hit with this yesterday for a few hours. loved it for the most part, but has anyone else felt it has a hollow, kind of tinny feel to it? it played well and when you get that sweetspot it felt great, but anything out of sweetspot just felt really jarring. oddly enough it was still forgiving and not horrible, just tons of vibration and a buzz almost to it. after hitting for awhile my arm just felt shot...anyone else have similar experiences? it's a pity b/c i loved the frame and was thinking about buying one but now im having second thoughts.