Yeah I feel you.I can be rather frugal myself.But when it comes to saving money vs not being in pain.Guess which I'll take every time.I learned to make them so I don't have to buy them! Remember... cheapskate here! Tight-fisted tightwad! I pinch pennies till they squeal and then I pinch 'em some more!
Making 2.5Ω coils just means I'd finally be able to use up that 30ga wire.
Andria