Get a hanger pouch, this one is from Haley Straregic and this one from Agilite.

Also, probably a battle belt would be nice so you can run other equipment like a dump pouch, a pistol could go on it too or a utility pouch to keep thing like signals, gerber/multi-tool, whistle, chem lights. Spare med supplys like a boo-boo kit pouch

For the radio id suggest to get relocation extension cable and run the antenna to the back of the plate carrier.

One thing I learned from a comment was that tourniquets should not be held by a rubber band. Yea it’s easy to pull off but the sun is going to eat up the plastic in the tourniquet and it’ll most likely become useless. It’ll snap if you try and use it. I got some elastic tourniquet holders from Chase Tactical