I think the air is getting thinner - and I want to see first a true Mezger-block replacement before i would judge this. I am sure the weight savings and set-ups can be tweaked - and using a modified PDK will shave off a few seconds etc - but it's all going to be close. I don't think they will go from 435 to over 500 hp so easily....weight to 1200 kgs that would be something.....but then costs probably will go thru the roof.