I'd been using sucralose based sweeteners like Splenda to take the "thon's wile dry, hi" off my bottle conditioned cider. Splenda is a PITA to dose into 300+ bottles at a teaspoon a bottle - it's not the cheapest product either. Splenda is 1% sucralose in a maltodextrin bulking agent. I found pure sucralose on sale at www.bulkpowders.ie and sprang for 100g. There was a certain frisson at work when a wee packet of white powder arrived for me. That stuff is well sweet - even the exterior of the sealed packet transferred enough "sweet" to my fingers to last all day. I used 10g to make up a 1l stock solution and dosed all 270 litres with under 5g. IIRC I ended at under 20mg/l which I'd say from memory seemed a little sweeter than the 1 teaspoon of splenda per 75cl bottle.
Obviously I should just grow a pair and try keeving a batch. Maybe later....
:-\
Oh yeah - I forgot the photo. Last year's work in one place: