I have been making my own groundbait for a while now and i am always experimenting with a variety of flavours and colours and different particle baits that i add. the g/b i make i use for the method feeder using the preston inline method feeder and also the drennon feeder. i wanted to add an oily trail to the g/b but didnt want to use halibut oil as this would ruin the flavour i had got so i used some vegetable oil 3 tablespoons to 1/2 kg what i have found is that i get the oily trail but it also makes the molding part so much better and easier, it releases from the mold easier but it holds its shape better and doesnt affect the breakdown in the water. this would work if you use from the shop g/b just thought id share that snippet with you. you might even be using it already lol