Happened to be in the garage twice in the space of a month or so, the clutch has gone from 32% worn to 42% in approx. 1k miles. Separately another garage told me that the reading is + or - 10-15% anyway. Since that's the #1 piece of information for buyers/sellers, can it ever go down again? Does warm or cold make a difference? Does driving it round the block so the parts align differently or something affect two successive readings? Does the value have more or less relevance for a GT compared to a 4200 etc. Thanks!