Hello Marine, I want to thank you for your very educative script. I never really solder before and after one season of e-buggy, I realized I can't live without doing it.
Before I start to solder around I went checking for instructions on the internet, I found your post, i bought the equipment, I followed the instructions and I practiced on scrap wires.
First thing: yes, using flux made my life easier. I'm a total newbie but the help of flux is unquestionable. Tinning 10awg wires is faster and nicer with flux.
I want to share my first solder job. I changed motor on my xray and I took the occasion to change wires too.
The stock wires removal from the HW 150A esc was I nightmare. I totally broke the 6 sec rule. I broke it again to fit the new wires on the post. Dunno why I went for huge 10awg cables again... Came out a bit ugly but looks sound and it works.
Connection on the motor went smooth instead. I would like your opinion:

Thank you again Marine!