They are very cute!!! This is just my opinion but these are way too young to evaluate for show potential, they will change quite a bit in the next 3 months. A long/bad shoulder is fairly easy to spot now but everything else I give time to see how it shakes out :) they look very healthy too...
Yes, black tort is showable and must weigh under 4 1/2 lbs if doe at senior weight. She is pretty long in shoulder and though not properly posed seems to lack depth.
Just an FYI for those attending, Ft Worth has ordinances for leaving rabbits in vehicles. We attended MR Nationals two weeks ago in Ft Worth so I would suggest purchasing sales coops or keep in your hotels. Sounds like it will be in multiple buildings and kind of spread out, might be a little...
I agree with Dood, also have to watch bands on castor. I have heard this is more difficult with the brokens versus solid but have no personal experience with this variety.
You have a shoulder issue with them all, long and lower than I prefer. If the ears are under standard then they all lack depth as ears should balance with body.