I want to do some tube work on my bed. I know a few people have said they come in a little lighter with a full tube bed. I don't get where the weight is. Espesially on a toyota bed. Is it the floor that is so heavy? Or where can I cut some weight off? I want to run side bars, leave some side sheet, and the rino-lined floor. But I'd also like to loose a few pounds while I'm at it.....