Thanks Jack...just what I was looking for.

Yeah the ground I'll be rolling over is a mixture of mown grass and seal down to the water (no vehicles allowed on this particular ramp, just used for single-handers etc..) so hence the need for a dolly.

Now I can see what I need to build...the pic was very useful.

The only problem is that now my wheel-barrow won't work...as I've pinched the wheel!!!

Many thanks for your reply and enjoy your season sailing! Cheers.