With stuff like that, the easiest thing to do is get a piece of paper, a couple of pins and a couple of bits of wool. Use one piece of wool as the spring, the other as the tether and pin one end of each. Use something like a little piece of card to join the other two ends. You can then play with how...

Hmmm, yes - that makes perfect sense, actually. The distance from eye to axle housing will get greater as the spring flattens, then reduce again if the spring inverts, or have I misunderstood? Yeah, that's correct. I think I'm going to copy your design if im honest nylon. You have first hand knowle...

Yes what you're saying is correct, the axle moves in an arc around the fixed locus that is the forward spring eyes. The only problem is that the axles position on this radius changes as the springs compress so it's not a fixed radius as such. When the springs compress and become "flatter",...

I don't think the tiny amount of binding is going to limit articulation on standard springs personally I doubt it too. Bambar with Shackle: Slightly easier on the UJ's Bambar Without: Slightly easier on the springs No bambar: vastly less life from springs *and* UJ's. Pretty much yeah, except that i...

As Anton says, they're essentially the same. The only difference is the inclusion of the shackle which allows for variance in the length of the tether. There are a lot of different designs but they all employ the same core functionality. The main difference comes down to the number of "points&q...

Well seeing as nobody guessed my part I nominate you to go next Ju

So here's the original picture:
And here it is again but zoomed out:
It's the little bracket which holds the wire mesh on behind the grill!

Sorry Ju, no such luck.

Time to reveal what it is...

Sweet! Love it when a big box of car parts turns up!

No it's not on the bulkhead.