Admire your project ozzy...just got done with the herbies myself and found they werent my solution either...did get sticky one side and they didnt move when adjusting though...
I went back to the sorbethane dots that came with (sound anchors) stand...they do grab for some sticky ness as well as being tight to stand for nice transmission between the speak/stand...i did use talc on top so i could move the dam things into position so...what are you going to do...the sorbies are cheap enough not to sweat it huh?