I'm not 'getting' the springs on the seat stays. How can that area move without a fulcrum on the chain stay? I have to guess that what you need welded is where the extensions are. Is that correct?
Tom
Springs where eye candy just a elusion to hide the too pieces put together. Not on the final design. The chainstays slid over the original stays they will need to be pie cut to narrow down to the original stays. Looking for nice clean welds very little to no grinding Tig might be what I need.