This was a yummy recipe. I was about 1/4-1/3 c of blueberries short, so I substituted raspberries. I also reduced the sugar to 3 & 1/2c, and used raw sugar instead of white. This smelt great when I was cooking it, a bit like blueberry marmalade. At first this tasted very sweet, however after leaving it in jars for the flavours to meld it tastes great. The lemon & orange cuts through the sweetness of the sugar & berry fruits. Thanks for such a great recipe, I gave some jars away & the recipients loved it.