So a fairly new crafter and level 50 warrior in these parts would like to get into making some gils via spritbonding and exracting materia. If my original venture proves bountiful I wouldn't mind throwing some slotted weapons/armor on the wards for some good buck. Some of the questions I have are:

1. How are you able to determine whether an item can have it's materia extracted? (so far i've been looking at http://ffxiv.mozk-tabetai.com/ but was curious as to how reliable this resource is?

2. What determines the quality of a Tier IV Materia (ex: Bloodthrist 55, 60, 65 ,70 Health) since I've noticed there are four different possible amounts of each stat.

3. So when placing materia into an item there is a requirement to have that corresponding craft leveled (ex: For slotting a Tier 4 Materia into an AXE you would require 40 Weaponsmithing I assume?) so if Slotting a Weapon Requires 40 BSM is there a stat that enhances the chance for success after the first meteria? And if the requirement is 40 BSM would being a 50 BSM have an advantage? (outside of being able to craft higher level pieces for that slot so you spiritbond faster?

4. Have players noticed a better quality materia from extracting HQ items?

Thanks for all your input in advance guys.