I'm just musing here, but what if you had a bottom plate (the melamine thing at the base of the router) that was tapered at 1.5 degrees in the other direction? Wouldn't that make an easy switch to a 0 degree base?
You could use the existing bottom plate as a template guide for cutting its profile, and then put a 1.5 degree angle on it.
The only drawback, now that I look at the tool in my hands, is that the bottom surface of the 1.5 degree base is not screwed on, but bonded to the base plate. Some other mounting arrangement would need to be devised.
