etd tunings

[A440A@AOL.COM]

> Not a light-weight family musically.  His
>rebuilding work is fine quality- and I heard him tune aurally once
>several years ago, before ETD's became so popular, and it was good.
>
>So, two passes, from 100 cents out, and he says it should last, on most
>pianos, a year.

Umm,  isn't this like saying you can clean a car so well that it won't get 
dirty for a year?   I have never seen a piano that stays in tune,(at least 
what I call "in tune") for a year.  I also know people that tune their piano 
every five years, whether it needs it or not. 
REgards, 
Ed Foote RPT