Hello. I live in Tropical North QLD Australia, and am looking at grafting my fruit trees (I have oranges and mangoes) onto another tree which we have growing quite wildly in this part of the country. It is called (I think) a 'chiny or chinese apple' It grows into a huge tree, and is covered in thorns, but profusely grows tiny apple like fruit about an inch in diameter. I was wondering if this might be possible, as they are nearly impossible to get rid of (even burning them out doesn't always work!), and I thought I might be able to put them to some use. I have never done any of this sort of thing before, so any advice would be helpful. Thanks!