Pete your sleeve solution looks very nice. Did it slide over the exhaust hooks on the end of the primaries? I ran with exhaust wrap for a few years but now run nude... When the wrap came off, the metal of the primaries had changed colour/surface texture quite noticeably and this brought to mind previous blatchat comments that suspected that the stainless had overheated and weakened the structure. I can't say this is true or not, any comments? (A quick google seems to disprove this)