I now have the rim back with the alloy repair company and they are gonna weld it and fit the tyre for £57. Tis worth a try I think considering a new rim is £508 - OUCH!!!
The alloy guy also laughed when I told him about the 0.3mm tolerance. He said that this may be a valid tolerance for manufacture but defo not for normal use.
They are just using an easy get-out statement that is bollox.
Spot the difference