Grammatophyllum temperature tolerances

[smweaver]

I'm considering purchasing a couple of varieties of Grammatophyllum scriptum, but I've never grown this species before and would like to know if someone could provide some information regarding its temperature preferences and tolerances, especially during the winter.

Also, the crinitum variety is simply a form of the species Gram. scriptum, right, and not a separate species? Does Gram. scriptum stay smaller than Gram. speciosum? I realize that "smaller" is a relative term, especially when used in a genus that's known for containing large species?, but I'd rather avoid a plant that's going to require a forklift to move it about.

Thank you!

Steve