How much of a monumental fuck up is that then?
Have spent 2.5 hours doing the bottom rib (3 colours) of a cricket slipover for ds1. And then I looked at the bit of the pattern where it says "Change to 4mm needles" in horror 
Have I wasted my time? Do I have to unravel it all, or will it be ok if I just carry on with the 4mm ones? Am thinking it might make it hang looser but otherwise be ok?
Help please?