Toshi,
Cym lowianum is a lovely species with great potential for a beautiful display of flowers late in the season. However, be careful of assuming it is 'Pitts", although similar. It has dark red on the lip, as is typical of lowianum, but without having a tag to identify it as 'Pitts' you are always safer in applying your own clonal name. Just my
worth of opinion on affixing clonal names to unknown plants.
I agree in the suggestion to wait until the blooms are past prime to repot. You have waited long enough for this display....ENJOY IT.
CL