Does anyone know a good musical reason why the euph parts are generally written on the same line of the score, but the baritones, tenor trombones and the tenor horns get a line each? It makes sense to put the base parts together as having the bases playing often out of unison is uncommon in any large musical group, but why the other parts are split as they are? I suspect having the euph parts together means a greater tendency to play in unison. Also, why have one front row cornet part for 4 good cornet players, but a separate 2nd and 3rd parts for less capable players? Surely it would be better the other way round? Do these unwritten rules of composition mean that music gets written in with those rules? Often the first bar and euph are in unison on something complex, whilst the 2nd bar is resting. Why is three players right, four wrong? thanks.