oh my goodness, I was just about to say this exact thing. Great comment!

Oh come on, depends on the outside covering. Bend it and if there are cracks then replace it. Never solder the areas next to each other, stagger them so if for some reason the heat schrink tubing exposes it won’t be in contact with any other wires. Use quality tape or better yet heat shrink tubing. Size it so when it shrinks it is tight around the joint. When using black vinyl tape, us only the best like the electricians use, otherwise it’ll unravel in no time. I’ve used a thin small zip tie at the end to prevent that! As you can see, it is not for the average person. An iron, tubing, quality wire, patience, and experience is needed.