(Phil) Shouldn't be too bad. One is expected to get that note on the 'bone (not too often) but the worst thing about it is reading it, being all in bass clef. The rule is that if it's in the stratosphere and on a space it's a C, otherwise it's a B (usually Bb). If it's a D the composer/arranger is not a trombone player. These high notes are far better played by trumpets and cornets anyway. Power to your embouchure. :-)