8mm/06, how can you tell I don't treestand hunt much anymore, never even dawn on me it might reduce stability! Perfect reason why a good quality safety harness is needed everytime you climb in stand, sometimes we don't think or things sound better on paper vs reality!

However I did have a few perm. stands few years back made out of wood and flat steel(Duh!), on those I simply made a skateboard type surface, where I used sand and then painted it with a thick exterior dark flat coloured paint, ended any footing worries. One could use the actual skateboard tape on a mat or foam substance at a fairly reasonable cost as I am not sure my method would last very long given the materials suggested, just a thought.