Yes, it was as easy to fit the heated-grips as you made it sound.
Took me 3 hours, and that was with 2 cups of tea, no sense of urgency, and many other interruptions.
The hardest part might be sanding down the throttle twist tube to get the heated grip on, but with a Dremel it was not exactly difficult.
I have a bit of sheet stainless steel spare, so will probably make a new mount for the control panel as I am not compleatly happy with the position.