Does anyone have experience or comments on either of these mic holders? Cab Grabber: http://www.audixusa.com/docs_12/units/CabGrabber.shtml Amp Clamp S-Series: http://www.ampclamps.com/sseries.html I was looking to purchase something for live sets so I can mic my cab, that would help reduce clutter a bit. Anyone use these? Are they a waste of money? Positives/Negatives? Other suggestions? Bueller?