Heehee, thanks for the contributions.
Being in Singapore, many technical knowledge and materials are unavailable. However from what i managed to piece up bits of information, especially from China artists, they swear by heavy 12oz canvases for mural sized paintings (etc. large paintings of Chairman Mao?)
I know for sure that some of my coming works are like 1.5m and larger pieces. I'm just hoping to hear any experiences from veterans like you all here, and find out where we draw the line to using the usual 7oz ones, or it's really ok to use heavy-duty canvases for even small sizes.