Haven't had virus troubles from either so far. On the clubmaker forum I just warned against shoving tungsten powder mixed epoxy up the tip of a graphite shaft as a swingweighting method. Said that if the epoxy plug ends up higher than the top of the hosel it can create a shear point, and besides that how much weight could you add with tungsten powder mixed epoxy? They don't think I'm so wise, maybe they're right???