Any opinions on which would be better for strength, hardness, and retention of gains, or if either would be substantially more dangerous? Mdien seems to be harsher. Both stacks seem to be potentially good for these purposes. Anyone tried both, or have opinions on a comparison (aside from don't stack methyls)? And for anyone with good M5AA experience, is it exclusively advisable to use it in moderate-high doses, but only p/w, or are people using it every day? Any possible complications with either stack, for those more learned in chemical interactions?