Cant equate weight of hens egg to quails, so have experimented.
I put 12 quails eggs in the tm basket with500g water. Cooked them vapona for 10 minutes and were perfect. Also easier to shell than normal as the shells go brittle with the steaming.
For Xmas I am going to Ido scotch eggs but with quails eggs and so will only cook them for 9 minutes as I will recook them in the oven once they have their sausage eat coating!
Do try them they are lovely and look dinky served with aperitifs, smoked salmon etc