I recently made a bench strop and ordered some of these bumper feet for the bottom. http://www.amazon.com/Sorbothane-Hem...6765040&sr=8-1
They are a little pricey, but I wanted something nice. When they arrived, my initial reaction is that they are "squishy" and not solid... I immediately thought they would be no good for the strop. I applied them anyway, and to my surprise I found that they provide a very slight give when stropping, that actually makes the bench strop seem a bit less "hard" and slightly more like stropping on a hanging strop. The effect is subtle, but I really like it.
Anyway, this may not interest anyone, but I thought I would share.