sorryabout that , i know i diddnt mention anything about in progress work, but that is why i asked, because i am working on a archtop les paul and i was wondering how you could get a 1 piece body to be lighter or how 1 piece bodies are chambered. sorry.
It's no biggy. I was just saying that, since none of the threads you've got going have to do with a particular project (that you've posted about), they should go into a different section.
About making a one-piece lighter, well you can't. You have to have a top if you plan on chambering it. There are different chambering techniques to be found. The simplest is removing most of the wood but only leaving enough on the edge and a block in the middle for the bridge and the pickups to attach to. Then you put a top on. It can be the same type of wood or different, whatever you want. Here is a design like that:
http://projectguitar.ibforums.com/index.php?showtopic=27131
BTW, Gibson LP's aren't chambered and most of them have maple tops, not mahogany tops. If you already have a one-piece body with the top carved (that must be a thick body blank), you could alternatively take some wood off of the back, chamber it from the backside, and put a top over the back.
CMA