Okay, I am an idiot. I need a half size down for NB# shoes, now I am trying a few of them again. Do the 508 break in after a bit of walking? Breaking in, as in "mold" a bit more to the shape of my feet? And does the plastic insert around the heel get a bit softer over time? I really like these 508s and except for the insole they feel pretty great. But I have mad problems finding the right shoes.