Is this case a flat case. I saw pretty much all the pictures but not really sure cause everyone wants to show off the caps with a from-the-top shot :)))).
A picture from a side would be nice.
lehaininhI don't have any recommendations for specific products, but your best bet is something that glues on to the bottom. Adding large feet might negate the usability of the leather straps though.
lehaininhI recently bought one from the site, it came with some flat rubber feet. However I wasn't to keen on sticking them on, instead I cut a piece of some thin anti slip rug stuff from ikea (http://www.ikea.com/us/en/catalog/products/80227877/) , i cut it so that it fits in the top of the case, when I'm using the board on something slick, i just lay that under the case.