There's nothing that says you couldn't mount that woodhaven Angle-ease to a large sub base with nice handles and use it above the table, but I don't know how you are planning to control it. With the bit at an angle, there won't be a way to pilot it accurately without some sort of fence on your sub base.
Maybe a set of Chamfer bits will do the same thing as what you're trying to do. Check out http://pricecutter.com/html/catalog/productGroup.asp/486 (you'll have to cut and paste the link) $99 will get you a set of 5 cutters that will do 16,12,8,6, and 4 sided boxes, and each will cut at least 7/8 in thick.
Ed's right, a little more insight as to what you're trying to do might help us come up with alternatives
Maybe a set of Chamfer bits will do the same thing as what you're trying to do. Check out http://pricecutter.com/html/catalog/productGroup.asp/486 (you'll have to cut and paste the link) $99 will get you a set of 5 cutters that will do 16,12,8,6, and 4 sided boxes, and each will cut at least 7/8 in thick.
Ed's right, a little more insight as to what you're trying to do might help us come up with alternatives