True, but I just bought an arbor at Home Depot for less than $5. With the cost of the slot cutter ($4 + $4 for shipping) it would be less than $15 for the whole setup. I'm not sure that you could get it for less than that. It's tough spending money on a tool that you think you will only use on one project. Then one of your buddies decides he wants to build a cabinet and it becomes easier to justify the cost...
Dino Z.