

After a couple of experiments with dissolved sugar and artificial sweetener I've come to a couple of conclusions:
- Adding whole lemons contributes to the bitterness (I'm guessing the pith).
- Using some lime juice would add a little complexity.
- Tons of added sweetness is required, either sugar added to the finished product or sweetener at some point.
To this end, for my next batch I am thinking:
1L lemon juice
500ml lime juice
1kg sugar
2.5/3L water
Artificial sweetener to taste
Thoughts?