I play a No. 3 VanDoren Blue Box on a Ridenour RZ MT-36 MP with a Rovner Versa ligature. I had a few No 2 1/2 strength reeds left and I played on one of them. To my surprise they did not collapse or squeak as I went into the altissimo range. The sound seemed a bit more focused as well. Should I continue using the harder or softer reed, or alternate between the two?