I personally wouldnt use the velcro, way too much movement. your trying to stop the movement here, not add to it. Might pay to make something a little more solid to attach it to your scope.
There are other ways to autoguide with the EQ6 but requires you to remove the hand pad, and use a little circuit to attach the mount to the computer. Its called EQMOD and is bloody brilliant. I use it for all my GOTO's and is awesome. Does take a bit to setup if your unfamiliar with Ascom drivers etc... more info...
http://eq-mod.sourceforge.net