3-4 pbs is fine for divisions, if that's the way you want to go. Attached
as they are, the leafless pbs are mostly just acting as "storage tanks" for
the rest of the plant. If you have 2-3 leafless ones left from the center,
it's quite possible that they might sprout new growth -- esp. if they are
still connected to one another but not to the rest of the plant.

On the other hand, you will generally get more-bigger-better flowers out of
one big plant in one big pot, than from the same plant divided into 3-4
smaller pots. Also takes up less space. If you decide to go to a larger
container, I'd suggest a slat or net basket. And if you can't find a net
pot to invert for the bottom center, another kind of pot will do -- a
smallish clay orchid pot, or even a plastic pot with numerous drainage
holes. The point of the inverted pot is to avoid creating a soggy mass of
potting media in the center, which would have a hard time drying out before
the outer edges get crunchy-dry.
--
Kenni Judd
Juno Beach Orchids
http://www.jborchids.com

It's a 10 inch pot. This was why I thought I should divide it. But
are the leafless back bulbs likely to get new growth? They don't
currently have growing ends, just a "dead" (?) end and the end that is
attached to the newer bulbs. I would still have 3 or 4 bulbs on the
parts that were repotted.

Alison