Then I'd say a tin whistle just isn't an ensemble instrument. There are physical limitations one must acknowledge. Trying to ahve a tin whistle heard among all those other, louder instruments is a pipe dream (pun intended).Reminds me of the PDQ Bach thing where Schickele says the Lute is such a quiet instrument that if there's even another instrument in the ROOM, even if it's not playing, you can't hear the Lute.
Alex