So...
I'm thinking I'd like to try rolling back the front and rear corners of the front guards, starting with my newest beige coloured guard since it does not yet have a mud flap or a fender flare, and I will need a fender flare to pass pit inspection in NSW.
Does anyone think this is a bad idea?

I've never been impressed with the factory front arches, pinching inwards towards the bottom of the guard.
I saw it in a car magazine years ago and have been looking at videos on youtube.
If I do this, I'll need a heat gun, a plastic faced hammer, a ball peen hammer, a hacksaw to open up areas for metal working and perhaps a small piece of wood if I want to reform the inner lips where the mudflap attaches.
So yeah, I now have only 1 cm clearance for tyres of 25" diameter.
I would like to roll the bottom corners back 1.5-2" so that it would easily accept 27.5" tyres; about the biggest tyres I might be interested in atm.