Short rant here..Why did later manufacturers of tractors move away from the only suspension available in a tractor? I love that big coil spring idea, along with others on the older equipment. I've had them with heavy single leaf straight springs, some with U-shaped leaf springs, some with the T-bar and spring set-up and all were better at protecting one's physical health when the job calls for long hours with no chance for some ease except to stand up for a while...which I usually do anyway for circulation.
Before it gets too far, I know some still have a spring mechanism but they are made out of cheap steel, and painted, in a box style lever and spring set up that only resembles a real cushion. On top of that a small in area solo seat covered with the hardest foam thin pad for cushion. The only ones like that I have, when the moisture got to it, immediately lost it's paint which allowed it to rust and seize the lever/spring box. It's like trying to sit on a concrete slab. And seat belts? On a tractor? Good googly moogly, if I screw up and it's gonna roll, I'm gonna bail!!!