welcome N/A...
A slot cutter is what you are looking for...
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A slot cutter is what you are looking for...
.

the fin is used at the bottom of the frame.. not in the pass way...Busdriver; Hi, and welcome!
Re the pocket door guide system, you have thought of the fact you'll have an upstanding fin on the floor which will be vulnerable to damage as well as a tripping hazard?
Any pocket doors that I've installed have had a guide that fitted on the face of the pocket, or in the case of large openings, aluminum extrusions which featured threshold 'ramps' on either side of the door.
Pretty sure I've never used the fin thing except on a wall cupboard(?)....