And the winner is . . .
I just finished an intonation test on the Dolce, using my three mouthpieces (DW 4ABL, the stock piece that came with the Dolce, and the combination of a Doug Elliott N104 rim and a TT cup), coupled with a large LeFreque plate on the top bow, which is supposed to influence intonation. Six combinations altogether. I measured the pitch on every note from the low Bb to the high Bb, including alternate fingerings. I put everything in a spreadsheet, printed it out, and, and marked out the cells where the pitch was more than five cents off. The column with the greatest number of clean cells won -- the DW, without the LeFreque plate.
There are still some bad notes. The high open Bb is 15 cents sharp, but 1st valve is only 5 sharp. Lot B is 20 cents flat, but then that's common to compensating horns. Low Bb is 20 cents sharp. There are some other notes that are 5 cents one way or the other, but that can be fixed, with a little lipping. Not bad, all told.
Obviously, other people's mileage may vary, intonation being a combination of several different factors, including the input from the individual player. But apparently this is what will work for me.
David Bjornstad
1923 Conn New Wonder 86I, Bach 6 1/2 AL
2018 Wessex EP100 Dolce, Denis Wick 4ABL
2013 Jinbao JBEP-1111L, Denis Wick 4AM
2015 Jinbao JBBR-1240, Denis Wick clone mouthpiece of unknown designation
Cullman (AL) Community Band (Euph Section Leader)
Brass Band of Huntsville (2nd Bari)