The elastic plastic strings gives several advantages: easy tuning, good pitch stability,unbreakable, replaceable, low cost, easy to amplify, ease of portability and easy to play by anyone.
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Step 1: MATERIALS
2- Tuner- Use 5/8 size nickel or brass plated cup-hook screws.Use the type with a washer collar molded on .The hook needs to be closed with a plier. This is necessary to tie the string to inside the loop thus formed.A 1/16 in. drill bit is needed for the holes used by this size screw.
3- Crimps- Strings are held in place using jewelry crimps. They can be u-shaped, tubes or bead crimps.They are available in art-craft stores and are economical.One crimp is used at the screw end and one at the anchor end under the disc.Plastic strings when knotted come unravelled so crimps must be used or glue in place . Long nose pliers are ok for crush-crimping.
4- Strings- I use stretch-cord made of space-age polymer found under Arts and Craft jewelry..Clear material can be colored using color perm-markers. The E-6000 glue will not soften the plastic 1mm. diameter strings.
4-Tools- See figure- Also a Dremel is ok for hole drilling. using 1/16 bit.
5- Cost of materials --under $5.00