I have been using 3-5 lbs of Marquette cake/skins in low end kits to bump them up. I've added that to Cab, Nero, Cab/Shz, Cab/Merlot, Barolo, Chianti ...Mostly Paklab kits. I find it works well. They need to bulk age a while. they drop a lot of wine diamonds.
Sample Barolo :
3 lb sugar
2 tsp peptic enzyme
gal bag 4 lb frozen marquette skins
3/4 cup med oak plus
I would not be afraid to use them like a grape pack to boost kits that lack them.