I have never heard of  any thing being done like that.  Our Wenonah Spirit II seemed to have the bow seat too far forward so I moved it back a few inches( should have ordered the sliding seat).  Very satisfied with the finished work.  Ordered a longer aluminum seat bracket from the factory and installed it so that rivets were still placed in the old rivet holes plus in the new holes I drilled.  Also ordered new seat from the factory.