Not 100% sure yet, for the moment its gonna be 4mm aluminium from the actuator pivot to the rear pivot and 2mm stainless steel from the actuator pivot to the tip (with it being bolted to and overlapping the ali at the actuator pivot point) so that the tip in total is 4mm stainless.

Id been advised though that using two bits of hardox (probably 4mm) instead of the two bits of steel/ali mix would be more likely to stand up to the impacts from spinners that the claw may (and most likely will) take, which is true, but itll have to depend entirely on weight as two bits of hardox at the size my claw is would be a good 3kg

Jeroen, that bot looks pretty slick - I like