Offset drive-line by TKT sprockets

As you know by now making way for the 240 tyre required off-setting the chain and running the chain trough some tunnels in the frame.
This is a sketch of what I initially though the offset should be.
Marco from TKT spockets allready had a lot of experience with wide-tyre converions and offset sprockets.
In 2002 he had showed us his FJ1200 project with 240-section tyre at the HOK14 party.
He's also the man behind the modular offset-sprocket on Robert's "Satan" GSX1100.
Modular as in a separate offset-axle with a exchangeable sprocket allowing gearing changes.
All said and done at the next HOK party he gave me this 54.5mm offset sprocket, with a 20mm dia. nose that will allow the sprocket to be supported by a standard Suzuki rear wheel bearing.
The sprocket is designed to slide over the output shaft.
Much care has been taken to make absolutely sure the sprocket has zero outrun and centers on the outside of the spline.
But hey... what's this!?

Damn.
Someone made an error here calculating the offset. A 11.5mm error to be exact.

Turned out I forgot to remove the thickness of the spacer behind the sprocket in my calculations.

Luckily Marco showed great sportsmanship and modified the sprocket without complaint.
A week later I could pick up the 43mm offset sprocket, one-off rear chainwheel and "show-chain".

For now I'll be using this cheap, narrow, non O-ring 530 chain for mock-up purposes as I don't want to be cutting a proper GP-spec chain too short while sorting out the required wheelbase and such.
Now the alignment is perfect!
...as is the chainrun trough the tunnels.
The driveline is looking very neat and tidy.
Thanks to TKT sprockets who did a tremendous job!