Only thing is Im not so sure if accelerating the cure speed doesnt make the epoxy brittle. I sometimes use micro balloons in my epoxy and I get the same effect if I add too much. I know that it gets as hard as glass and it is real brittle if you just set some out and see what happens. If it cures normally it is hard but not nearly so brittle, its a little more pliable which makes me feel that it has more give while maintaining its strength. Just my opinion, not scientific fact.