All the boys on air do this.
Plush done a mates brand new scirocco whilst installing air, They did warn him that insurance may class it as a write off to cover their own back's

I wouldnt personally do it, but if it's a show car not running silly power used on the road daily then each to their own, Plenty of boys running the mk4 platform do this but iv yet come across a smashed up one after a notch so unable to comment on the weakening of the chassis.
Looks good though mate, once welded and undersealed its unlikely anyone will know it was done.