Like to confirm some things about my Catasetums

[Cymbaline]

Hey Thank You for working with me as I learn about these guys.

I want to verify. I read on the internet that you can start watering and feeding Catasetums when their roots are 3 inches? So I'm checking out the roots in my first two pictures of the same plant and I think I see 3 inch roots. This would mean it's safe to start watering it. Just want to confirm.

Next question about the last picture. I think I made a mistake with repotting this guy. The new bulb , growing off the old one .. The old one is pretty large so I assume the new one will be about that size so my pot maybe too small? What do you think?

Thank you for your help.