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It seems a little light weight. Won't a cable cause a wobble?
The "bumps" look like the kind of rubber feet that I just bought at the local home improvement store. For the cost it does look nice and I think that it would do the job.
 
doesn't seem like that good a deal to me... you may be able to find something for less, or even make your own. i would probably look around real stores before getting that since the shipping is pretty much the same as the product...

of course, $20 isn't *that* much, and it would save you the trouble of having to look further.
 
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