This is the one I have also and even though it only does 10 eggs at a time I usually only do the 7 BUT they are always great!!
We could not figure out how to fit the 10th egg. The first ring fits 6 eggs, then the second piece goes on which seems to fit 3 and we balanced one more on the top but it wouldn't close with it standing on end. Ours didnt come with a manual so I had to look up how to use it online Is it ok to lay the 10th egg down on the top? I was afriad to because you have to poke the holes in the eggs and i thought it would mess things up.