I opened up the Top 3 strut holes a bee's willy, just to give it a bit extra. Camber still Ok, and wheel alignment Ok
Er, do you mean the three holes in the chassis under the inner guard that retain the top of the macpherson strut? If so, I'm not at all sure I would have been doing that. You've now lost the ability to hold alignment on the front end - you're relying on friction between the strut and the chassis rather than the bolts to hold an alignment.
In any case, if you move the top mount outwards, then adjust the camber back to spec, you haven't actually opened up any more room for the axle - what you've "given" by opening up the holes, you've taken away by adjusting the camber back to spec.
Steve.