When I last used vitalin (which was 5/6 years ago now) I mixed in a mixture of parti-blend and different sized trout pellets. Tangerine sized balls were then fired into the area where I wanted the bait. I then fished a 15mm hooker trout pellet over the top of the area.
What I also did was to use the Korda funnel web PVA and make golf ball sized round bags using the vitalin mixture. This was then hooked onto the rig and cast out with the hook bait.
I worked very successfully, as it was slightly different to those using vitalin and method feeders.