After a week, everything possible has been extracted from the apple (the other fruits are just coming along for the ride).
I poured a few ml into a shot glass and diluted with about 3 equal parts of stevia/water mixutre to bring to around 20%abv for tasting. It tasted great! Needs a slightly stronger apple flavour, but great. (I tasted all of them, but the skins-only was the nicest by far). The stevia is definitely the key to making these things work, so I have to thank Doc (The Doctor) for sharing his experience and suggestions on using stevia with tinctures in his commercial distillery over the last year.
Here's the tinctures with the fruit removed.
Now I thought about the fact that I want to bottle a schnapps liqueuer at 20%abv. So to get that stronger apple flavour, I could use more skin in the 93% tincture...or the alternative I had been thinking, was the possibility of diluting down to say 50%abv, and soaking new fruit, and then diluting down to the final 20%abv and soaking a third lot of fruit before straining.
The problem with this, is that I would need to add the stevia into the water that i'm diluting with, so I didn't know how it would go having fresh fruit macerating in a 50%abv solution with stevia already in it...I know I like the initial method of soaking at 93% and diluting, so i'm moving on with this to continue the experiment.
When I first added the stevia water, the solution stayed nice and clear while the colour just weakened...as soon as I added the fresh apple though, it 'louched' and went a slight cloudy colour...I'm not worried, it still looks great, just a cloudy green apple colour...from what Doc has mentioned in regards to this, I expect that the cloudiness will stay as is now, so it will come down to a final taste test between the clear and cloudy schnapps at 20%abv that will determine the final winner.
I've also put down a larger batch of the Granny Smith apple skins to make a full size bottle of the clear version, which will serve as a great comparison between the two. The other fruits aren't showing anything special so far...