If you are happy with how you had it, put it back I say. If it's too tight it'll be not just stretching prematurely but potentially damaging sprocket bearings. At least that's what my teacher told me! And depending on the geo some bikes run what look like hilariously slack chains. T7 rings a bell.
Anyway if it does damage one way or the other it's better it was your fault and not theirs
.
Anyway if it does damage one way or the other it's better it was your fault and not theirs
.

