Blue Tak -- where do I get it?

most hardware stores have it or something similar.

and you may find it called called reusable putty or reusable adhesive.

Go to the school supplies section of any discount store, drug store or office supplies store and near the glue, you should be able to find some of this. However, you may not find it in blue - it may come in yellow or some other color, but it's the same thing. In the past I've seen some audio dealers that participate in A/V websites try to say that it's not the same thing as their blue tacky stuff that they sell for 3x-6x the price, but they are a) morons ignorantly parrotting what someone else told them; b) outright frauds; or c) the kind of people who can hear the difference between using blue and green marker on the edges of their CD's or who can hear the difference between a speaker wire that is 2.1 meters long and one that is 2.15 meters long (i.e. blithering nuts).

i used the 3M brand, it's off-white color (would prefer black) but it works great.

Saw it at a Lowes in SoCal area. Was bunched together in a end-cap in the hardware section with other earthquake-proofing items. Not sure you'd have that section in DE though.

any office supply or hardware store will have this stuff. It's not always blue. It costs a buck or two. It's all the same and it works great.

I get mine here >> http://www.in2art.com/art-supplies/blutack