I used the Hammond box for mine as well - It was a rather tight fit due to the pillars inside for the screws holding the box together. ?I had to trim the corners of the board on one side to get it to fit, and mounted a PCB support through one of the holes for the onboard microswitch (whoch I ommitted).
I also used DuPont connectors to plug in controls and key sockets so I could remove the radio for troubleshooting or repair without having to de- and re-solder everything - That made it a REALLY tight fit, but I managed to get it all in there.
