Hi all, this is my 1st post. I have beeen playing trumpet since i was 7, now 56. I own 1952 Martin Committe Deluxe w/Heim 2 Mouthpiece (Play most of the time) 1976 Silver Bach Strad ML 37 Bell with 24 CT gold trim kit and 1st Valve trigger 1994 Callichio Silver 2/2 ML (Reeves Aligned) and last but not least a 1972 Yamaha silver YFH-731 Flugel wtih a Reeves/Purviance P8 Rim F E mouthpiece. I use various mouthoieces on the Bach & Callichio. ( Bach 3C, Purviance 8A and sometimes just for fun a Marcinkiewicz Bobby shew More on my history later. My question is any tips or tricks to make fast trilling between C and D on the staff easier?