Not sure if anyone reading is actually interested in these minutiae but, I still have a CS-5000 too, and yeah, and when I first got it those crazy feet took a while to figure out! Not user friendly until you get the concept, but they make sense from a design standpoint, in a German kind of way. I still don't know what the red slider things do....
The only plastic is in the headshell assembly (not the tonearm) to keep weight down, since it incorporates a Vertical Tracking Angle adjuster, which would be too heavy even in aluminum. I considered removing the adjuster and just using the barebones headshell, but I think the inherent value of good VTA far exceeds whatever would be accomplished by removing excess plastic.
The only plastic is in the headshell assembly (not the tonearm) to keep weight down, since it incorporates a Vertical Tracking Angle adjuster, which would be too heavy even in aluminum. I considered removing the adjuster and just using the barebones headshell, but I think the inherent value of good VTA far exceeds whatever would be accomplished by removing excess plastic.