Have been thinking about a seat chop [rough mock-up pictured above] to improve the proportions of the XJ600 in profile.  The old seat felt to rear heavy and to be honest it’ll never carry more than one person. Pimmel and Messer [pictured below] have made an interesting seat chop on an XJ600 mounting the seat support on bar that supports the top of the suspension. Considering that the new suspension that mounting point is not feasible to use but sure another can be found.