How deep to pot cattleya in S/H so new root growths doesn't become desiccated?

[Subrosa]

I fill the pot with leca up until just below the drain holes, position the plant so as many root tips as possible are touching the leca, then fill around the plant up to the level of the rhizome, even if the plant sits low in the pot. If that's the case, I wait until I see a good amount of new roots then pull the plant up a bit and add more leca. I repeat as necessary to get the plant looking good in the pot.