I have been trying my hand at some sodas and ciders recently, and I have been skipping the back-sweetening step in favor of laziness.
I tell people to add sugar to taste after it is carbonated. There is still some residual sweetness leftover in most of my sodas, but I just give people a little warning first if they like it sweet.
I just made a Kvaas/Ginger Ale with 1 lb of pumpernickel that I boiled for 10 minutes and let steep for 8 hours. I strained that liquid off into my mr beer kit with 1 oz of ginger, lemon juice and zest, chopped raisins and large chunks of chopped ginger (another ounce or so), 1lb of corn sugar and ~1lb of honey.
After about 4 days it is still a little sweet, so I put some into a couple bottles with some priming sugar. I will wait a week before putting it in the fridge and testing it out.
Hoping to come out with a low-alcohol (2-4%) brew with a lot of ginger nose.
Next time I will definitely be using lemon and/or oranges directly in the brew, rather than just zest and juice.