This is pretty great. Why do you feel you need 6% body fat though? Am interested as that is pretty low to constantly keep.
Well, there are actually two reasons.
The first is purely aesthetic; I store my last little bit of fat over my lower abs. My arms, legs, chest, upper abs... everything else, leans out well before I'm able to get rid of that little pouch around my belly button, which means that I need to get down pretty low in bodyfat to have a fully defined 6-pack which I'd like to achieve before my birthday mid June... just kind of a personal goal.
The second reason is actually the real or important one.
I need to put on a significant amount of lean mass over the next 18 months to 2 years. So, I'd like to leave myself enough breathing room that I can put on the fat that inevitably comes along with bulking while never exceeding 10% bodyfat. I'd like to hit a walk around weight of about 185lbs at 10% bodyfat which would put me in a position to be able to quickly cut to 170lbs for a weigh in. Going from roughly 153lbs at 6% up to 185lbs at 10% gives me room for about 10lbs of fat gain.
The 145lbs and 155lbs weight classes are dominated by guys in their late teens and early twenties (speed, athleticism, reaction time), whereas the heavier classes tend to get better with age (skill, experience, strength, knockout power)... and I'm certainly not getting any younger