Some clarification on changing tanks. If you fill the 2ft with water from your main tank and use a seeded filter there should be no issues with moving the fry sooner. You will generally only run into problems when transferring young fry into different water conditions - i.e two set up tanks with water parameters that don't match.
As for you having another female ready to go - haha, the fun is just beginning! I told you you would need a bigger grow out tank
As for you having another female ready to go - haha, the fun is just beginning! I told you you would need a bigger grow out tank