All speeds are based on the maximum AUW so if you were going to do anything you would be looking at reduced speeds for lower weights. 70 is to fast and wil lead to floating down the runway. If you fly 70 Kts pror to taking full flap, the speed will reduce to 65 on application of the final stage of flap.
I recall landing one in a spot landing competition where I touched down at 45 kts, the ASI will underead at the AOA involved and I don't recall the stall warner even bleeping once.