2 readings the same - how to help get reliable readings

[fitterinfo]

Check your scales are sitting on something level and firm. I use a bit of chipboard. The floorboards are old and creaking here and then carpet on top means I would not get a reliable reading to be repaeated - I could never get the same reading twice.

With my trusty off-cut of chipboard it is close to being the same reading as many times as is needed. I am confident enough I rarely repeat a reading unless it seems off.