Close Peter,
The cruise figure is possibly a little higher... but as the guys are saying it is 65kts.- for almost everything. The only other figures I can think of are the stall and VMCA and they are down around 50kts. The stall generally being the higher of the two.
Similarly the figure to use for the Trisander is 80kts, for everything, - that explains the ground performance difference. The Islander can get in and out of almost anywhere, - certainly when empty.