Just a quick note: I got a heads-up to make sure the crimper I got was the correct one.  The depth of the crimp may not be correct, so I'll find out tonight when I test it.

EDIT: Instead of trying out the crimper coming today I'm going to just return that and order the correct one (as recommended by fellow Sling builder Des) and go with that.

What a proper crimp should look like according to NASA:

The NASA document is located here (everything you ever wanted to know about wiring!!): https://nepp.nasa.gov/files/27631/NSTD87394A.pdf

The crimping stuff for these types of pins starts on page 91.  The above diagram is on page 97.