Ha! It would have been quicker if I had used this method (I hear that's the authentic way to do it...) :)
I remember telling you about it yonks ago FW, the thing made out of the disguised stone. It looked like sandstone, but was in fact a thin layer of oxidation on a lump of Effinhardstone. Ryaner, imagine Wile E. Coyote hitting a concrete road runner with a hammer, and his arm goes all 'Beyoinoi-oi-oing!', that was me. Scutch hammer and scutch chisel. No attempt at stone age repro after I realised how tough the stone was.