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wow... that's a 5 year old pirate thread, funny.
this is a much argued topic... and people will swear on their lives that their answer is right. use what works for you and what you have on hand or available to you.
myself, no sleeving for me. I will only use a solid wall tube. it's stronger. the air gap, no matter how slight, opens the door for failure of the tubing. If you could get a tube to slide into another with ZERO tolerance and gap, then it might be close, but still not as strong. you'd have to have an insane press to get it that tube in there, and the one yer sliding it into would have to have been bored to an exact dimension. Any discrepency would allow for a failure point.
Don't buy 2 pieces of tube, just buy one in the size you want and never look back. Then again, I'm no engineer, I just have some real world experience. There's reasons I run .500 wall lowers on my rigs...
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