Jamis SL seatstay repair. When the chain gets shifted into the cassette, the derailleur has no where to go but up and around. The result is usually an impact with the seat stay. This I repaired then put one more layer of carbon fiber 3K plain weave around using the vacuum for cosmetic purposes. Then Made a stencil of the SL, hand masked the lines and airbrushed away. Looks good as new!