hi mate, your bang on with what you said, plasterboard is a low suction back ground, therefore suction control by using pva is not required ( see suction control under the faq section ;D) in addition to this i would also recommend using board finish as oppose to multi..... multi is more designed for medium suction substrates and therefore on a low suction background (plasterboard) the finish of board finish will be far better, hope this helps mate........................ BIGSEGS/DANNY/CHURCH... CHECK ME OUT!!!! ;D ;D ;D