Hey Nurse Boy, Cyrtodactylus tuberculatus are Australias longest gecko, N.amyae the most massive. Pseudothecadactylus lindneri is smaller in SVL than than P.australis and P.cavaticus as well as all Saltuarius, Phyllurus nepthys, Phyllurus caudiannulatus, Phyllurus amnicola, Orraya, Oedura marmorata, Oedura gemmata, Oedura filicpoda, Nephrurus wheeleri, N.shaei, N.levis, N delaeni, N.asper, N.amyae, Gehyra baliola, Charphodactylus laevis and Cyrtodactylus.
Those on that list with a chance of being bigger than it full out are C.laevis, Cyrtodactylus (not chance definitely bigger), the other Pseudothecadactylus and some of the Saltuarius.
For SVL measurements see Wilson and Swan Ed.3.
Oh and Dickyknee you know you only need to convince them to get a gecko not a brand new camera to photograph it with right? Nice pics.