I used 9% extract with 1% chocolate if I remember correctly.
The melon recipe I make is 8% extract and 2-1/2% flavoring. Keep in mind the extract does not have much natural flavoring (on purpose). Currently steep a blend of 8% extract with 4-1/2% flavoring (Raspberry).
OK. I might try adding small amounts of cherry/ vanilla to Golden Cavendish, and maybe chocolate to Golden Extra.