The lip you choose to use is generally used that way so yes they go in as bought some builders make their own so they can get a different action than a std. lip.Wood plugs have to be test swam because of the subtle differences in wood densities.Adjusting them is done by the line tie bending it up will cause it to dive more and vice versa if bent down you shouldn't mess with the lip if at all possible if it gets screwed up it will need to be replaced and re through wired.I'm not a builder but this is how I understand it to be I'm messing with some kits this winter and some repaints of my chewed up stuff.