Not needing hand pollination,being a dwarf and being super productive were some of the selling points in the nursery industry.I bought one but could be a feather too warm for it to thrive.I held back when maroochy gold hit the market in a blaze of glory.If I cross the tropic sun with a pinks mammoth then a pink sun could be a real winner.I suppose the reverse cross would be a mammoth tropic.Obviously in Australia improved custard apples and cherimoyas would give the commercial industry some more spark.Asian markets are buying KJ Pinks,Pinks Mammoth and Hillary's white in good volumes.