I have a horizontal raised panel bit that does the 15° cut, Richard, but it only leaves a ~1-1/4" long bevel. The CMS has a small flange inside the fence well (left side) that I presume has some relationship with dust collection. This flange restricts the use of the 15° raised panel bit due to the 3-3/8" OD of the bit. I'm thinking that a session with a die grinder is in order so that I can raise the bit further and take full advantage of its capabilities. Not even that will get me the 2-1/2" - 3" bevel undercut that I want. Only a vertical bit can possibly provide the length of cut that I'm looking for. The short-cut bit is fine for doing sink cutouts, but just doesn't have the length I need for the purpose intended.
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There is a workaround for this problem. You can clamp an extra fence with a gap wide enough to accommodate the router bit to the front of the CMS fence and line up the bearing with the front of this new fence.