I used my Freud 208, 8" stacked dado to make a tongue on the end of some boards to fit in a groove for some dust panels I am making in my dresser. I found that it blew out the wood at the end of pass to make the tongue.
When I contacted Freud, they pointed out that their dados use a negative hook (which he indicated is why my 208 blew out the back of a board when making the dado without a sacrificial backer board). He pointed out that a positive hook (Forrest has positive hook) tends not do do that.
Now...
Has anyone used the higher end (44566) Harbor Freight blade? It appears to have a positive hook. I have seen a couple of very positive responses about it in a few messages on the newsgroups. Is there anyone else that has bought this blade and can expound on it? Here is a URL to that blade.