Mine was out on the lake today with the Griffon 2000, but we both came off the lake as there was a plethora of SMALL boats down the lake!!
Fellow Fusion-400's owners,
Good to hear that Nigel's Fusion-400 is up and running
Dimension for C of G is in the manual, feedback from your experience using this dimension would be great.
Generally, setting C of G on hard surfaces depends on your preference, battery forward will make the back swing around easier, battery back will make the front light and make turning a bit docile.
When on water with Fusion-400 at full speed, ideally you want the bow wave to start forming 1/4 back from the front.