I'm sure i can drive one of those if i take all the seats out.
Ray, i think that's what Del is saying, if it don't really matter that it puts 10 mins on your journey you have no need to overtake the lorry in front doing 60 when you're limited to 62.
That said however you're not allowed in the 3rd lane so can't see it makes much difference.
The other issue is of course while towing your engine to generate the power for your Laser Ray Gun you're going to struggle up hill (and you're going to be down a bit on the 50K MW)