Also worth noting that in my previous attempt, I tried to stay closer to the linked recipe. It ended up taking close to 2 months to ferment, and ended up with something close to 7.5% abv, and was pretty dry -- to make it sweeter I ended up killing off the yeast by heating, and adding sugar, then force carbonating in a keg.
In this batch I:
Decreased the overall sugar
Substituted some sugar for ldme and added yeast nutrient
Added extra lime rind
After these changes, the result was much less dry, and I didn't end up having to add any additional sugar