The tripod on the Celestron NexStar Evolution page
http://www.celestron.com/browse-shop...ar-evolution-8 looks to use the same legs as the Nexstar 8SE
http://www.celestron.com/browse-shop...ized-telescope, which uses the same leg components as far as I can tell as the 130 SLT
http://www.celestron.com/browse-shop...ized-telescope. The SLT tripod is made well enough, but the bottom leg sections in particular are pretty flexible when the mount is raised to a comfortable height.
Some users report that the SLT scope is much more stable if you don't extend the tripod legs (but that kinda defeats the whole point!).
I replaced my Celestron SLT tripod with an aluminium EQ2 tripod, which is MUCH more stable than the Celestron steel tripod. The bolts and pivots at the top of the EQ2 legs fitted into the Celestron SLT mount OK, requiring just that the holes in the lugs on the bottom of the mount had to be reamed out just a smidgen. (That's a technical term!)
I can't guarantee that replacing the legs on the 8SE or Evolution mounts will be as simple, but if my experience is anything to go by, it's definitely worth looking at!