The site actually suggests that they are not bad.

http://www.henneburyspecialtywoodcra...a_mortiser.htm

Go to the bottom of that page and check out the illustrations. That thing
can cut double mortises, haunched mortises, trapzoidal and T-shaped mortises
all in a single "operation" just by mounting the appropriate bit.



"woodworker88" wrote in message
oups.com...
That makes my Delta look like a toy! I wonder how much one of those
blades costs.