http://squamishserpents.ca/care-info...-one-enclosure
You missed the key word. "Without any problems YET" People who house together often forget that one little key word.
Why you'd spend that amount of money of those morphs, and then risk housing them together is beyond me. You could afford the morphs, but not two different set ups?
To offer more to the thread, balls grow at different rates, especially when they are being fed smaller than normal meals. One hopper every 7 days will allow for very slow growth.