hi, i just got a couple kits to play with, they look great! i wont have much time yet to do all the steps to finish them but couldnt wait to put one together. i read someplace here or in the store that you can crimp the belly grommets. i did notice that they didnt fit that well, to the curve of the plug, just off a tad, could catch with fingernail easy. any tips how to get them to fit flush ?