Bolt on Wide Arches

Now, me and the other half are looking at putting a wide arch kit on car as my OH rushed the job with an arch roller. I'll honest this is actually on a Jetta, but you guys helped me massively with my old polo. We just wondered if anyone had heard anything along the lines of; once the arches have been cut and welded back, do the tyres tend to catch on the arches that have been cut back. As we dont want to cut the arches out and not be able to drop the car as much as we want. Doesn't matter if the advice isn't for a polo golf or jetta. any help is much appreciated.