Using a router to create reveals in drywall

[Saskataper]

I really want to start playing with reveals in my drywall designs using TrimTex reveal beads and was thinking a router might be great for creating the 1/2" gaps in the drywall that I need.
For example one of my ideas is to create a sort of negative chair rail using two or three reveals parallel to each other running around a room, this could be done by my boarders by cutting strips but they would hate me for it.
I'm thinking an OF on a rail would do the trick, maybe with a jig to hold it at the right height on the wall.
Does this sound like it might work alright?
I still have to find someone that wants a reveal design but if I have an efficient method to do them it could be another good style for me to offer to clients.

 

[Bikeboy80]

Getting all the way into inside corners might be tough?

 

[Saskataper]

Yeah I thought about that, corners might have to be done the old fashion way with a knife. Or it could be a cool effect to just end them short of the corners by a couple inches. Another idea I have is to create a sort of negative wainscot similar to this one I did a while ago but rather than building out just the wainscot section I would put a second layer of drywall on the entire wall and just have the boxes recessed with a couple reveals as the chair rail.

 

[Paul G]

How would you avoid hitting drywall screws?

 

[Saskataper]

This would be on new construction so the screws are visible and even then only the exterior walls have screws in the field, the interiors are glued.