Not all Weather Pack crimper tools are created equal. You can find them online for anywhere between $20 and $140. I bought the tool on the right (red handle) for $37. Looked decent and I knew I was only going to make a couple dozen crimps so the $140 pro model was not required, right?
I bought a bunch of extra terminals so I could practice, watched a couple of u-tube instructional videos... then proceeded to ruin about 15 pins before I gave up.
I ordered the tool on the left (blue handle) from Mike at Replica Parts (sponsored vendor). He charges $120 and when you return it he credits you $100 back. $20 rental and it works perfectly. Or keep it for $120 if you see more weatherpacking in your future.
The blue handle tool has a block attached to the lower jaw that secures and aligns the terminal. Perfect crimp, first time, every time. The only way to go!
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-Steve