Yes, performers have to get into some of the nitty-gritty of practicalities that many of us composers can only experience from a distance. One of the pleasant surprises I had in Bucharest last December was hearing at the premiere of my Ciaconna Variata (piano trio version) that it wasn't as severe as I'd thought it was. Aaron J. Rabushka (from whom a more detailed report of the Bucharest concerts will come soon) http://www.cowtown.net/users/arabushk/