few questions 1. my biggest worry is head spacing/ putting in a new barrel would buying a pre-ban kit mean I don't have to head space? 2. what tools are needed ? 3. I have found that saiga conversions are quick and easy. they are cheap and I can get a working ak for under 500 dollars. building your own cheaper or just about that price? 4. what are some common stumbling blocks? 5. best place to get kits ? and barrels?