you should wait for the next batch i ordered the resin for yesterday,as i said all the pads turned out to be best on a smooth rim.
the super hard ones work on a harsh grind,but you dont wanna clean your rim every few hours riding,the aluminium hydroxide filler makes fills the grind up.shame,they hold great.
and you´ll end up with a white rim and a bad bite...
could be different for different rims though,i only had mine to test,an atomlab GI
i said it several times,the pads are still in their baby shoes,but i will keep doing this over the winter and later models will be better in terms of performance.