Hi Choong,
Nice pitcher there! And thanks for clarifying the story on that hybrid. I have a few of them but had never heard the story behind it.
On the trip with Ch'ien last month we came across some real nice N. burbidgeae growing in Mesilau Valley on Mt. Kinabalu at a little lower altitude than the N. rajah's. Both were growing in the ultramafic soil in very humid conditions (cloud forest) so I'll put up a couple shots for you to show to your plant for hints;
The territory and conditions of N. burbidgeae;
Youngsters;
Mesilau Valley - early morning, before clouds;

Ok now, I'm assuming this is a N. burbidgeae lower pitcher, as it follows in order in my photos, then again it could just as well be something completely different! What do you think?;

And likewise;

Ok Choong, if your plant doubles in size after seeing these shots just put me on the 'cuttings list' for a later date!
Hee, Hee, Hee!