We have tried several recipes of the internet, but we weren't interested in the picling spice taste. It seems like the best quail eggs I ate from the store just had pepper spice and vinegar, so that is what we tried last time. I went to the local Mexican supermarket and talked to the owner and he hooked me up with some really hot pepper and I ground it up in a coffee grinder. We peeled the eggs, put 3 to 4 jalapeno slices in the bottom, and about halfway up into the jar for more spice, added 1/4 teaspoon of the ground pepper, and poured hot vinegar over them. The jars we used were actually old pickled jalapeno jars that we got at the local recycling place. Heated the lids, screwed em down tight, and all but one resealed itsself. We gave it 2 weeks, and they were awesome. The spice doesn't really penetrate the eggs, but the really had a nice flavor.
If you have quail and don't like a recipe, just keep trying until you get what you want. It doesn't have to be a complicated recipe, and if you mess up, toss em out and try again. Do small batches and you haven't lost much.