FWIW- I too use an oxy-acy setup, #2 tip exclusively. everything from
1/4" copper to 1-1/8. The rosebud is for anything over 1-1/8. I use the torch handle with the knobs downstream of the handle, just before the tip. Oxy is 21 psi, acytelene is 7 psi. Even got a cutting torch tip, rarely used tho.