Haha Heather, I see what you did there!!! If I were to take a stab at it, I'd guess male. Here's my reasoning: can't tell anything from plastron concavity/lack there of, the formation of the anal schutes don't say much either yet, but the tail tells 2 stories, small says female, but the slenderness, and the more slit like anal orpheus (instead of star shaped) say male to me.
Interesting! I'm still on the wall if I want male or female. I always think of him as a male though. It will be funny to see how they turn out since I think of half my herd as male and half female. Either way T Rex will help produce some beautiful Het Hypos.
Ya I'm definitely on the wall too... Just leaning male at this point. But you are totally right. Either way T-Rex is going to produce some good looking kiddos!