Bach 341 Trombone 5G

I have played a Bach 4G for 40 years and loved it. However when playing 1st Trombone in a First Class Brass Band I was starting to get too tired because of constantly playing high notes and the 4G is a BIG tenor mouthpiece - (Perfect for orchestral work but on your face all night playing higher notes can feel a bit TOO big..)
The 5G has the same bore and depth as the 4G but is 1/2 a MM less across the cup at 25.5mm (4G is 26mm) - You wouldn't believe the difference 1/2 a MM can make for playing higher notes all the way through a concert - YET the sound quality is 99% as good as the 4G. Focussed and direct but with a lovely rich quality. Highly recommended!!