Good is good, bad is bad - piston vs rotor is almost irrelevant. Most of my instruments have pistons and best valves I’ve ever used are on my 1919 Boosey Silbron cornet (pistons), but the next best are 1 and 2 on my tupperware tuba (rotary). Why they win is they’re adequately light and fast but have ...

Does anyone know of a source of replacement rotors for the PlayLite/Tiger/Coolwind/ZO/Rheinsound/Playtech/&c. plastic tubas, preferably in UK or Ireland? My 3rd and 4th rotors were not properly anodised and corrode so badly that they can seize within 24hrs; if I don’t play for a more than a week I ...