It gets even better though ... Why not join shorter circuits together
The Extended West Circuit.
The Extended East Circuit
And of course the Joining West and East together
But of course what do you notice ... Yup even when running the extended circuits, there is still one of the short circuits available to be used simultaneously.
There may be more versions but I can't be bothered looking
Let me know what you think, which version you like best. If I have time , I'll try and put some gravel and stuff around to make at least some of the versions FIA Graded