I have a Bobby Shew b flat trumpet, currently i am not sure if I will be using that or my Getzen eterna. I have been idle for 10 years and just got back into playing. i have been back playing for 2 months and want to get my orchestra chops back up. Is it worth converting a b flat to c and how much would it cost? i am not rolling in money at this time, is it worth even bothering doing this?