Cattleya and Laelia hybrids mounted or potted opinion

[Roberta]

Unless you are seeing active root growth that says "NOW", I would not mess with it until it's through blooming if possible. You probably will still have new root growth proceeding for another month or two. If you do mount it, the spike will probably be OK though... I have mounted active L. anceps front divisions (recently cut from the mother plant) with blooming spikes and didn't lose the flowers.