Pla is far from brittle if you get the right kind and dry it before printing. Uv issues are minimal to non-existant in rc unless you leave it sitting in the son all day long all summer long. But upside to printing, print another one when body runs out.
Petg is really difficult to get a brand/type that isn't extremely brittle (almost no impact resistance)
So far of 10 brands of petg I've found one that's not garbage for RC use. Explodes on impact.
For pla, well more specifically, PLA+/PRO/Tough I have found multiple brands that can take a beating and come back for more.
Petg with the right type and design, is good for when you need black if summer's get hot where you are. Pla dark colors tend to soften in the sun over about 90F. End up warping and such.
Beyond that, PLA is a far better choice for RC than PETG could hope to be now. I have 4 rigs, 3 with printed bodies now. All in pla. First test was done in petg, ya that started falling apart due to cracks after second roll over. Decent tumble and spent 10 minutes picking up parts.
Reprinted body in Tough PLA, I can't hurt it so I have an excuse to reprint it because it was printed fast and not dialed in for a clean print.
Second rig is rather heavy, tumbled and slid several times when out, no body damage at all.
Now my vanquish build will have a printed body as well.
Also have printed cages, one I just did was a cliffhanger cage for someone. Can twist and bend it all you want, good luck breaking it. Printed in PLA.
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