... but I am also never going to solder a wire connection on my airplane with the main reason for this being that type of repair is not FAA approved and would ground my plane.
I dont think thats correct... if you look at FCC STD-019D it specifically states that soldering can be used except in the ground and lightning supression systems (which would make sense since a lightning strike would vaporize the solder). Other than that there are even some parts of the spec where soldering is recommended (like for high frequency/shield connections).
There are some stipulations like that the connection you solder to should have mechanical support for the wire (e.g. the solder does not provide the mechanical support) but otherwise its showing to be ok...