Mi permetto di suggerire una variante,dettata dall'uso in fuoristrada della moto.
A volte la cruna picchia contro i sassi; le flange laterali in alluminio,in caso di contatto, tenderebbero a piegarsi e a mantenere il tutto storto.
A mio avviso potrebbe essere tutto più elastico realizzando anche le flange in teflon.
Non so se sia altrettanto economico,tuttavia si potrebbe realizzare comprando dei taglieri da cucina e sagomandoli in maniera opportuna.
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