I picked up a Model 111 7mag stagger feed. I plan on putting a 243 barrel (that I already have) on it for my daughter for next deer season. I'm planning on getting a barrel nut and lug, and getting the barrel nut wrench. I made a barrel vice. I know that I need a bolt face. My questions are:

1 Am I missing anything else bolt related or otherwise?
2 Found a post in this forum that said the 7mag box magazine should work although it might take some alterations to the magazine: does this just consist of moving the lips closer together?
3. Would buying a 30-06 mag for it be the better option and would this eliminate any feed problems running 243 cases through the 06 mag?
4. Is an action wrench necessary?

Thanks
Lonnie