Medallion wing is really a problem.
I usually have 3 options:
1)Use a smaller fly with the same tippet
2)Change the mono for a "fatter" (from a 0,10 to 0,12)
3)If i don´t have a smaller fly i reduce the tippet lenght
Very very important is reduce the "false casts" when fishing.
When the problem continue (airplane propeller), i cast 2-3 times and i revise the tippet, i try to "destroy"(?) the propeller applying heat with my fingers or with a rubber to the tippet.
I prefer to do it instead of tying wing with CDC, i don´t like them when wet, they become much smaller.
Excuseme for my poor english.