Crimping is the work of the devil incarnate.I fixed the fraying around the crimp
Why even bother using FastOns when the posts clearly show a stamped/punched hole for soldering?
And if you really are dead-set to use FastOns, it would take you just a few minutes to dab it properly w/some solder.
It isn't that you gonna take it on/off like a wall plug (<<if anything) and since you are already up'ing the guts, a "little dab'll do"!
The use of heat-shrink "looks" to be sporadic and not consistent... especially this one below:
Learn to love sniffing solder fumes, like it was your version of foreplay before a