Alloy bodies seem to stand up OK to rocks
I have a very stony yard to mow
An Alloy deck Snapper has been doing for 10 yrs now and I did try the Super 24 as well. No damage to either although I did put a rock through the Pt plastic carburettor on the 24.
That might be a result of the unusual east west mounted PT I have. Carby is way out the back.

Jeff