with a wooden comb to help install --
and instructions on how to do it.
Weave a wand between the strings, move it to the bridge with the comb, and you have a second bridge which causes numerous interference harmonics, making your guitar sound like a steel drum.
Hear this effect on acoustic guitar here.. and more instructions and features of Instant Steel Drum here.
Possibilities with electric guitar effects are endless. For example, add 'tremolo' and get your guitar to sound like a Hammond B3.
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