The easiest thing for me though was realizing that coil springs are literally coiled plastic piping like you use with some home plumbing. I mean seriously, think of it, does steel bend? **** NO! its strong as hell. But plastic does..
So how to make coil springs at home? Pretty simple..
Get yourself one of those 3 foot long "mailing tubes" that you roll up a painting to ship it in. Then take about 15 feet of white 5/8 inch plastic plumbing tubing. dont' get ABS, its for full size trucks. Now at one end start melting the tubing with a blow torch. As it gets hot and starts melting slowly wrap it around the mailing tube like the coil spring seen on truck above. when you have the whole length done you let it cool down then just fab up spring buckets and you're good to go.
Don't tell anyone that secret though. It's kind of a mechanic's thing we don't wanna get out.
Here's a picture of a coil spring coiled too tightly. Leave some gap