EarthTainer Pruning and Sprawling Question (pics)

[lapk78]

In my three EarthTainers, I'm growing 1 determinate tom (Top Gun - far left in image) and five indeterminate toms (left to right in image: Black Krim, Lemon Boy, Big Beef, German Johnson, & Mortgage Lifter). All are in the 'traditional' conical cages purchased from Lowes. Also, my 2nd floor apartment balcony is facing East by SouthEast.

As I understand things, I don't want to ever prune determinate toms. However, I'm unsure if I should prune the indeterminates. As of today, they range from 16 - 21 inches tall and all have (at least the beginnings of) flower clusters. Is it too early in the foliage development stage to allow for flowering/fruiting?

Also, what about pruning the 'suckers'? I know there are several threads discussing this matter, but none seem to be directly related to EarthTainer gardening. Should I prune ALL the suckers? Should I only prune SOME of them? NONE?

Finally, the Lemon Boy is really starting to sprawl (see image). It's even growing branches that are growing straight downward. They seem like they are meant to help support the plant. This may be seen in the image provided. How should I address this? SHOULD I address this?

This is my first year using EarthTainers as well as my first year taking gardening seriously, so I'll inevitably have more questions in the future. Thanks!

-Lyle