GuyC What the picture is not showing is a large fender attached to the cubes at the front laid horizontally, cushioning against the floating concrete pontoon. So when applying engine power, the fender has some give.
Having made a few practice goes, started to get the feel of it, hopefully able to reduce revs getting on and off. Still the end result being the boat and engine are totally out the water.
As 36valley mentioned about getting off, I have the winch that can be used for helping getting on and off if needed. Haven't needed the winch so far, but until I get the mark of where I need to be positioned, a bit of trial and error.
Also as the boat is fouled up from this season afloat, I reckon that crud build up has obviously not helped give me that slippery hull surface needed. So once cleaned up, the result will be so much better.