You may also want to do something like slice your sweep up into 2 pieces by drawing in a dividing line through the middle of that cylinder and using Boolean difference using the line as the cutter.

Then you may be able to work on each half of the sweep with some slightly different adjustments, like make the cylinder go all the way through the sweep on one side, but keep it in the notched position on the other half where it is not skimming.

- Michael