I have always wondered why Boosey and Hawkes made so many 3 Valve BBb Bass's. You walk into many a Band room and there in the cupboard is at least one if not more ( our Band room has 3 ) 3 Valve BBb's. Yet there is much music out there which requires BBb to use a 4th Valve so Why Make so many instruments that are not capable of providing what Bands Need from Them. In The Bands I've Played in wherer a pedal has been needed say low Eb below bottom G from BBb I have had to play low Bb below pedal C on My EEb because the BBb with only 3 Valves has not been capable of playing the note needed. My origional question is Why make so many of them ? you don't see as many 4 valve instruments of the same era.