Schlencker Surveying (Qld) Pty Ltd phone Helensvale Professional Centre Suite 206/3 Sir John Overall Dr Helensvale, Queensland 4212 map Schlencker Surveying (Qld) Pty Ltd phone Helensvale Professional Cntr 3 Sir John Overall Drv Helensvale, Queensland 4212 map if (!IN_DEV) { ?> } ?>