Right, before we start I am an adult, I know how to make an informed decision. Don't bother posting pictures of cracked rotas or telling me they're substandard.

I'd really like to get some rota grids but they're not available staggered so what are the relative pros and cons of running staggered tyre sizes on same size rims beyond potential sidewall flexing on the rears? Genuine user feedback would be good, especially track experience.