I am slowly getting good at this. CamBam is really easy to use for the stuff I need. I tried to use F360 CAM, but no success. CB is worth every penny!
This time, the horn is made out of 18mm beech glued planks. The alignment between operations was on 6 mm wooden dowels glued into the waste board. I tend to think that a ball mill for such a shape is actually not so great and the finish looks much better with an end mill with a very small step.
On my current project, I tried to do all operations at once for each part with 1/8" end mill and although the machining time increases, the results look great with MDF so I hope my next beech horn will be perfect. Here you can see some machining errors and me trying to cover them up.