To pinch or not to pinch

[SumOfMyBits]

I did notice the biggest one of the bunch had roots growing out of the pot and was about 1" long outside of the pot. I think I may have to bite the bullet and put them in bigger pots. I was hoping to let them grow as long as possible in the small pots so they can stay under the MH light longer, but once I pot up I won't have room for all of them and half of them are going outside.

I don't know how much room you have or how long you are waiting to move outside, but I suspect you'll see better results quicker moving them to bigger pots. 3" to 6"(?) maybe to keep most under lights if moving outside is a problem. 'Course, you could always keep the best and get rid of the others (ie. unload them on friends and family and hope for the best.) Then when the time is right, pot up to the final pot.
Cheers