The LignaTool LT120 or LT60 are fantastic versatile sturdy tools ..... but .... they are also very expensive. So if you have to make those big dovetails just once or twice just go for the old fashioned hand tools. Or do as mentioned here https://www.pinterest.com/pin/401242648030499408/ in one of the comments .... and make your own jig and buy a cheaper router bit.

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