I’ve started using modelling chocolate more and more and I also use the same recipe as jessicakes blog suggested by 3dsweets. Here is a cake I just completed. All the green trees and plants are modelling chocolate. Oh how I wish I used it for the dinosaurs too as it is much more forgiving and probably would have been alot easier to sculpt. See photo here
A hint: when you mix the melted chocolate or candy melt with the corn syrup, it is going to ooze lots of waxy liquid. After thorough mixing, spread it out on a piece of wax paper and let it set up for a few hours. Blot away the excess liquid as the mixture sets up. Then wrap it up and let it finish cooling down in the fridge overnight. next day take it out, break off what you need and start kneading it to warm it back up – it will become very pliable. good luck.