sylvestris
Yes, the baskets should setting in a way so as much of the baskets as possible is inside the main tube (and exposed to the spraying water). Than as the roots grow out of the baskets they hang exposed within that main tube. Because they are exposes, they will dry out faster than if they were in
growing medium that holds moisture. Because of that, they need regular spraying in intervals (short but often), so the right timer is important. It can be as short as 1 minute on (just long enough to wet the roots), but you don't want the roots to dry, so I probably wouldn't want the off time to be longer than 10-15 minuets. But 15 on, and 15 off might work just fine (because a lot of timers have a 15 minute minimum on/off settings). It will just be a bit of trial and error to find what works best in your situation and with the timers you have.