Revell’s PBY-5A Catalina has been around for 20 years now and I have seen quite a few built and it looks large and impressive when finished. The kit comes in two styles- the “-5” who has no wheel wells and the “-5A” which does. Eduard has released sets for the PBY-5A which allow improvements to the entire airframe. This set (#48827) addresses exterior details.
The first thing addressed by the photoetched set are the engines which are missing their wiring harnesses. These are well done and easily added but do take some time to get all the wires attached to the cylinders. There is also some grating for the air coolers.
The floats and wing ends get a little more detail with inspection ports on the wings and tie down points on the floats. I am surprised these aren't included in the floats set but that PE fret was packed so there may have been no room.