I've been using Vandoren ZZ 2.5s on my metal Beechler #7 . . . I've also had luck with Rico Jazz Selects (filed) . . .
Eric Marienthal is using blue box Vandoren 2.5s on his Beechler #7 . . .
I know a lot of guys who like Vandoren Javas on their Beechlers . . .
I don't knowwhat lig setup you have , but if it's the bullet shape chamber like I think. Try a Rovner soprano lite lig with a Java Jazz / 2/ or 2.5 I think you will be amazed at the range and volume. Stevo