This happened by chance last night. I had cut up an assortment of fruit for making single fruit cocktails but ended up just putting in some of everything and the flavour was great. Made one jug with white rum and the other with gin and both were very tasty. I don't think you need to be very precise with measurements. We probably used more liquor than 200ml in each jug. I had the fruit in the freezer for about an hour before making too.
This recipe makes approximately 1.2L of cocktail depending on size of fruit and how much liquor you put in.
1/8 watermelon chopped into large chunks
1/4 pineapple chopped into large chunks
1 mango chopped into large chunks
1 ruby grapefruit segmented (do this over a bowl so you catch the juice that comes out while segmenting)
Juice of 1 lime
1 large handful ice
2 tsp sugar (or simple syrup if you have it handy)
200ml of white spirit (gin, white rum or vodka)
Place everything in the tmx bowl and blitz on speed 8 for 1m30s.
Drink responsibly