Homologation isn't hard as long as you plan to follow the rules they require before you start. You'll run into things like type of pipe, size and attachment of base plates, intrusion bars, bend radius and crimping etc. Cool stuff like you can only bend the front legs once i.e follow the A pillar down from the roof and then one bend and drop to the floor. Welds are critical with regard to penetration and all around jons - not tacked. My cage is in a circuit car but is legal for rallying - we designed it so that no matter what goes up front in the engine bay won't over power the cage with regard to speed and safety. The only difficult thing with the BBQ was sneaking it off the porch and taking it to the shed - it was a Christmas present and was only a few weeks old. Luckily my wife was on the phone...