Ok, so I am beginning to look at the Christiava Mk IV. I was going to build a Dakota Hawk, but need 4 seats. So, i was looking at 4130 tube from AS. I noticed that they have seamless and standard 4130. What is the difference, and does it matter what I use? Obviously, being on a budget, I like the cheaper, but if its not safe I would go for the more expensive. Just looking at options here, and figured I would try to ask here and see what y'all think.