For my taste, mate, I'd do the following:
- omit the apple. I see no reason to include it.
- make that 1 or 1.25 cups of sugar
- cut back a bit on the vinegar. You've got lemon juice as well; it's going to make your eyes crinkle!
- I might just be a devil and add a little more chili pepper, and a pinch of cinnamon.