M62TU timing chain tensioner - which is best?

[Squiggy]

While waiting for my new timing chain guide tensioner to come in the mail, I have been thinking about how these tensioners work. As discussed, the spring in the tensioner presses the passenger side guide against the chain, so the chain is properly tensioned at engine start and does not thrash around. Once oil pressure builds, the spring no longer does work because the oil in the tensioner now does the job of putting pressure on the guide to tension the chain. But this begs the question... why would you ever reduce the tension on the chain? Why not simply use a rigid tensioner? Especially if the chain is older and elongated (stretched). I think the purpose of the spring and oil pressure is to increase pressure on the chain over time as the chain falls out of spec over time and becomes elongated. The spring will push the guide in a little farther than when the chain was new. The oil pressure will also push the guide in a little farther than when the chain was new. If I understand this correctly (and I'm not saying I do) the tensioner is essentially designed to elongate as the chain elongates. However, once the chain has elongated beyond the point where the spring or oil pressure can keep proper tension on the chain... you have thrashing even after start up. In this case I wonder if it might be preferable to remove the spring and insert a carefully measured steel pin in the tensioner. If I am wrong about how this works the idea of course is non starter. But if I am correct about how the tensioner works then replacing the spring with steel pin might be an idea worth exploring. You'd have to be really careful not to insert a pin that was too long, but I guess you could start with one that was just a tad longer than the spring and see what happens. If there is still chain rattle while running then replace the steel pin with another pin that is 1-2 millimeters longer than the first pin, and so on until the chain rattle stops. If successful stop there and do not use yet another longer pin, so that you don't use a pin that is too long and puts too much pressure on the chain.