Football Stuff - teach me something 3 technique - 5 technique

[papachaz]

ok so in another thread, i issued a challenge to two guys who love to argue, to stop arguing and teach me some stuff i don't know. of course anyone is open to join the conversation. while i know there will be some opinion's involved, i want the thread based on things i'll understand, not just your opinion. I'm askin for Beef and Swift to get involved here, i'd like to know:
what's the difference in 3 technique and 5 technique, i heard a lot of this talked about during the draft, and i have very little idea of what they meant.

who do we have that fits either?
what do we need, and why?
who's available in FA that fits that, and why do you think so?

it's all plain and simple just football talk guys, isn't that why we're supposed to be here anyway? I'd like to know a lot more than i do, and i know a lot of you guys could teach me some things, include opinions to an extent, but no arguing