Maggie,
Manzanita branches can be a little thin, and like you said, not a comfortable place to kick up the feet... I like to use the sandblasted grapevines for that reason, they're heavy and sturdy, and the diameters of them are available in all sizes. The Southern California IRBA shows are usually where I pick mine up since they're by far the cheapest there and you can pick from a big selection. I would never order one of them, but you can from LLLreptile.com if you want to. I would assume they would send you something that wouldn't quite work. Try to plan out what shape and size you need or get 2-3 and screw them together in there to keep them all from shifting. Umbrella plants can be flimsy.... I have some of my cages filled with Hibiscus, even though I started with about 8 plants and now I'm down to 2-3. They're tricky to keep alive indoors, but they're very sturdy and handle a heavy chameleon well. Ficus also work well, simply because they're relatively thick and the chameleon can plow through the leaves and smaller branches and just sit on top of it all. Either way, try to keep a few horizontal perches at a few different levels in the cage, for different places to "kick the feet up" at different temperature ranges. I don't perticularly like those rubber wire vines (whatever they're called).... No real reason, I just personally think they're kinda tacky and not natural looking. What also works very well are large tree roots and driftwood, and I use both of these in some of my cages. They usually have a textured surface to them and make good gripping points for toes. Just make sure you clean and dry them good before using them. Good luck!

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Tyler Stewart
Las Vegas NV
www.BLUEBEASTREPTILE.com