Nice pictures of your jacks!
Thanks... Now im just sorta waiting for a couple to pair off. Hopefully.

I see both male& female in the pictures. So, you should have No problem getting a pair.
75% water changes every 3days ,along with a heavy& varied diet will speed up the process.
The one thing I suggest you do is - grow the fry to at least 2-2.5" before selling any. JDs can have a high deformation count.
This way you have a better chance of not selling anything with deformity.