Nice install. Nice car also
The remarks about the wiring are not really true. In my opinion (I'm an electrician) the power of heatshrink is terrebly overrated. It looks nicer and more proffessional but if it's safer then electrical tape thats been applied correctly I doubt. And the soldering I would only do when wires are connected to important OEM wires (as you did with the Ibus) for others I would use appropiate connectors (the red, blue and yellow ones you can shrink with pliers). And yes, bad wiring can cause fires but wires that are messy under the glove box can't when they are connected and fused properly. So,..
I like your install and don't bother about the bad responce about the wiring.
