A few years ago I took a chance and bought a beautiful Phillipino Q. Curly maple forearm, very long ebony points and butt sleeve. Both the points and butt sleeve have ivory inlays. The handle is spalted with beautiful designs (wood unknown, maple?) Signed Gracie Cortes. 2 shafts. Plays great and to this day is perectly straight.
About the same time I bought an unsigned Phillipino Q, loaded with ivory from top to bottom, ferrules, joint, butt cap, ring work, and many inlays. Birdseye maple forearm with rosewood points and butt sleeve. To this day it is also still straight. It has the best finish of any Q I own which includes some expensive Qs from US makers. The finish is very deep and looks wet.
I have heard many bad stories of P Qs warping, but from the 2 I own, there is nothing wrong with them. Look at all the great pool players coming out of the P. The makers there must b doing something right. I'm sure there are good and bad P Qs, but the ones I have are great.
Charlie