Opinions on inner cowl rust repir

[rechinca]

I have a small patch of rust in the overlap seem where the inner cowl and cab metals meet on the passenger side. I have already cut away some of it to start planning the repair. I have a bad feeling I will need to pull the inner cowl and replace that piece as a whole. Plus I think it will allow access to this area as a whole to better attack the rust under it. I also have a rust area on the LH side where the reinforcement is behind the inner cowl. Bought a piece to repair it from an original cab, but I am starting to think time and proper repair/rust abatement in the fresh air vent area will be the best plan. I have read a lot of the threads on cowl repair, just wanted to see if anyone else has done it recently and documented it.