If your scales have the exact weight at >>>each<<< wheel as the other place you had the karts scaled, then what the other place told you for cross was "WRONG" or there was a miss understanding.
Cross is a calculation based on weight on the wheels and if the individual wheel weights were the same on your scale as the "other" place, the "OTHER" place gave you wrong information for cross.
If wheel weights are the same then cross will be the "SAME". period end of discussion. maybe???? ...
I can't believe your scales are doing the calculating wrong. >>>> do you? that's the only way you can have the error if the other places scales were correct. When's the last time you saw a hand held calculator give you the wrong answer?
answer: never
... and the fancy dan comp scales will do the calculating correctly too.
They may not weight correctly but they will calculate correctly.
Same weights= same answer
different answer and somebody's scale didn't weight correctly butt you said they read the same. ?????
The scale can read incorrectly but it's "STILL" going to pass on what it read incorrectly to be calculated, NOT SOMETHING DIFFERENT.
... MAYBE ???? ...