[Invictus0]

> Temperature of the measuring tape at time of measuring

Can't tell if this is real or not. I'm fairly confident that the thermal expansion of the measuring tape is not going to make even a tenth of a millimeter difference in precision: does it have to do with the temperature of the skin?

[gowld]

It could be real (more likely a skin effect than a tape effect) but insignificant, but just a pile-on of "differentiating" features.