Re-pot And other questions

[littleflower]

New to Cattleyas..... Just purchased these lovelies from someone on Facebook. First question is, do they need to be repotted? I understand that cats like to be nice and tight in their pots but one of them is quite top-heavy. Also they have roots growing outside Their pots, although I think some of these roots are dead. One is in bark, which seems to be firmly attached to some of the roots, also with moss. My intention, whenever I do repot, Will be bark with some charcoal and may be perlite. Suggestions welcome. Lastly, with my other orchids I like to use net pots in other pots. I have had success by soaking for 15 minutes weekly or so, then thoroughly draining, Although I’ve read that cats like to be dry before watering. All help is welcome, thank you! So excited to try these orchids!!!