First off, you're seriously building your own table, and trying to save TWENTY DOLLARS on the second most visible and important part of the table? (the rail being the first) Not to mention, you're going full-felt, which makes it even more important.
Second, you're shopping in the wrong place. 3 yards of regular SSC at YAT
will cost you $48.32 plus shipping using the well-known coupon code "scottkeen" (15% off).
Seriously, don't skimp on this part of your table. Let's say you spend the $40 you plan on this material, and 6 months later, it's worn out. You either have to buy another sheet, or THEN get SSC. Either way, you're coming out behind. It's -EV...
Buy the SSC.