Not extreme really.

If I want to fit larger tyres, race tyres etc etc and still have the outer arch remaining 100% as it should....then it was the only option instead of fucking about with a dozen other ways that would never work and always give tyre trouble.

Weld it up, seal it up, throw on a lick of paint and jobs done forever ( well at least until you let a bodyshop paint the car a few years later then they start rusting because they didnt do their job right !! ) lol

Even the guy who painted the arches at the time, it was a good 5 years or so til the bodyshop got near the car and they were still perfect then.
2 weeks after the bodyshop painted the car, one arch started rusting.

Stupidly I left it to rust and ended up having to replace one arch again last year.