I use pliers to crimp scotchloks because like i said as long as the cap is all the way down it will work every time. I lost my 3m pliers to crimp them as recomended. But I have made a cheap crimper. Took a 2 dollor set of pliers and with a small grinding wheel cut a notch to perfectly crimp scotchloks! I even used scotchloks to install my radio in my work van. Actually the wires would not fit and I took the caps out and drilled the holes where you slide the wires in and it works fine. You can't beat scotchloks!!