[Nickbee]

By the time you spend 100 – 200 bucks for a dedicated dovetail jig look at the incra ultra for 200 bucks.

http://www.woodpeck.com/ultra.html

If it’s set up right it will give you a powerful tool for all kinds of routing, not just dovetails. That’s the route I went and can’t be happier… just my 2 cents...