Short blade? Limited shaving area?

. . . Have you considered a Dovo Shavette, or any of the other "replaceable-blade" razors
. . . that take a standard double-edge blade?

They might be all you need for the beard-trimming job you're talking about.

I've been using a DE (safety) razor, along with a straight razor, for beard trimming. The edges are pretty clean with a DE.

The old Shick "injector" razors have blades a little shorter than a DE blade, and are very handy in tight places.

. Charles