I will need to check the exact measurements on what is available but from memory the piece i was planning to get was close to a quarter inch thick i think. don't quote me on that. but im pretty sure that was what I was looking at.How heavy/dense is redgum? Blackwood is heavy and big oak is usually not as much. What is the thickness of the M2 stock by the way?
but i was looking at thicker pieces and the only option i could find for doing a heel height over 50mm in thicker stock is getting a 6 inch tall sheet.
anyway just because I will need to add taper then polish. etc it will end up being a littler thinner than the original stock thickness. also its probably going to have mill scale.