A couple years ago, I finally got tired of wrestling things around on the bench, and as you can see it really isn't deep enough anyway, so
I came up with a very similar solution, using a lazy susan bearing ring. It has worked well but when you're troubleshooting the leads get to be fairly long.
I'm currently making a second, deeper bench, so I can finally separate the radios and test equipment. I think I'll take just take the lazy susan part of the little table and make it so I can just set it on the new bench anywhere. I think that will be a better solution and, I can also recoup a little floor space in the process.
Having the ability to do wood working can really compliment the radio hobby at times.