1. That sticky waffle stuff is "Shelf Liner". It works VERY well to keep gear from sliding around, especially if you pile one unit on top of another (I have a ZIP Drive on top of a SCSI CD on top of a ham radio tranceiver next to my synths).

2. Blue tack does work quite well (but I recently discovered that it will not hold very well if you have it on a unit that gets hot (I tried attaching some halogen [IKEA] lamps to my 9k and the tack wouldn't hold them because of the vibration and heat). THIS STUFF, HOWEVER, WILL NEVER BUT NEVER LEAVE ANY MARKS OR REMOVE ANY PAINT (unless it was peeling beforehand anyway). I use it to hold a "glare screen" above the screen on my PSR-9000.

3. Velcro is great stuff (discovered in late 40's by a guy who got burrs stuck on his socks when hiking). If you fasten it with glue it will take off your finish. It does wear out eventually with continuous use (the curley nylon looses its curl).

Bob