Cobwebs will truely have to be swept out if you ever get round to booking your iva
my pedal box is 3mm and cp16 is 1.5 mm both are welded in rather than bolted. the car has been on the road for quite a while now and it has been fine. having said that the bulkhead can flex a little under heavy breaking. to sort it I have added a plate to the pedal box to stiffen it round the master cylinder. In hindsight I wish I had made the pedal box and cp16 as one single part out of 3mm plate which would have prevented me having to resolve the problem later down the line.