Cutting Cattleya rhizome?

[gdupont]

Hi all.

I remember a video by Andy's orchids where he mentioned that he stimulates growth on his established cattleya and laelias by just cutting the rhizome, leaving the plant in-tact and, in his case, still established on the mount.

I'm looking to do this in a potted Cattleya percivaliana. Just one question. How many rooted bulbs should the sections have? For example, if there would be two rooted pseudobulbs on either side of the division, would that be enough? Or should there be at least three on each side?

Thanks!