I confess that I do not have direct experience with the AR Legend, but I can make one suggestion that might take care of your problem. If your AR has an inner-outer turntable configuration, take the outer turntable off the unit when transporting it. This will do what it does on my Thorens, which is bring the sprung chassis right up to the top, and permit it to stay there without bouncing up and down like it would otherwise. Then take off the plug in head, and take off the arm counterweight, and you have a nice stable package for transportation. If you just have a single piece turntable, then pull the turntable off it and put it some place where it will transport safely. Same thing will happen. Sprung chassis won't bounce anymore. I carried my Thorens TD 150 back and forth to grad school in my car this way, (outer turntable off) and it transported just fine, and no damage at all.
Admittedly a crude expedient, but it gets you by without the transport screw.
And good luck from that crude, screwless old transporter,