Interesting thread recently on valved trombones, came about due to a band having similar problem to mine. We have not been able to fill our principal trombone seat with a regular player for some time. Are trombone players only to be bred in captivity? is there a shortage of teachers about? do they only want to play in jazz/orchestral groups? Are they only mercenary when it comes to playing - petrol expenses are not enough? Coincidentally I did find some rocking horse droppings recently which seem easier to find than a trombone player!