I;m going to repot it soon,

I just recently bought a dendrochilum. Not Magnum, but
filo-something or other. The vendor told me NOT to repot
it. Ever. Instead, when the roots start growing outside the
existing pot, just stick it down in a larger one. The one
I bought was already 'repotted' in this manner. He burned
a few extra holes for drainage and air circulation into
it then glued (I think) the bottom of the original pot
to the interior of the second. The one I have has at
least 20 flower spikes started.

Tracey