Wow - so many twins! I had one set in my first clutch, but didn't catch both poking heads out and didn't know there were twins until I spotted a baby snake loose in the incubator. It had escaped the egg container shortly after pipping and before I sealed it tightly. I assume the two lightest were my twins. If so, the twins were an albino and a het. If I'd had as many sets of twins as you, I would have had to quickly shop for more gear!