Grammatocymbidian Mem. Nathan Newman, how big?

[nogreenthumbs]

I recently purchased a (I love typing this name) Grammatocymbidium Memoria Nathan Newman 'NN'. It's a nice looking plant, I think with wonderful blooms. It's outgrowing it's pot (4.5") because the newest p-bulb is straddling the lip of the pot. I have been told that this thing should grow like a Grammatophyllum and apparently, they can get enormous, ie easily 6' wide and 6' tall. I don't have space for something like that. I'm wondering if anyone has one and how big yours is.

Mine is currently about 2.5-3' tall.