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Low cost, or flash. Or make your own, they are "easy" to make. When learning how to use one (there is a reason they are still sold) it doesn't have to be precise. You just need something to pract...
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Low cost, or flash. Or make your own, they are "easy" to make. When learning how to use one (there is a reason they are still sold) it doesn't have to be precise. You just need something to pract...