The instrument evolved from Rhodes' attempt to manufacture pianos to teach recovering soldiers during World War II under a strict budget, and development continued throughout the 1940s and 1950s. Fender started marketing the Piano Bass, a cut-down version of the piano, but the full-size instrument did not appear until after the sale to CBS in 1965. CBS oversaw mass production of the Rhodes piano in the 1970s, and it was used extensively through the decade, particularly in jazz, pop and soul music.
When your orbit is nearly circular (periapsis = 80km; apoapsis = 84km), the difference is negligible in terms of delta-v. No need to wait for the Mun to come around.
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