Thanks BelArgUSA!
Those figures are very helpfull. Now comes the time consuming work of adjusting scalars and trying them out.
I guess you know both your airports and breweries. I put those Grolsches on ice for you.

Cheers mate!
Thanks to all you other guys for replying too.
I was indeed wondering why our carriers still landed at preston, when they could go non-stop. I thought it might have something to do with payload restrictions on the long stretch. Now I know why!
Cheers all,
Nils