Hi, all. I'm not too confident in the results of Tolerances. I am very confident in the results of ScientificErrorAnalysis. Sadly, the Tolerances package has an awesome +- operator, while ScientificErrorAnalysis has the bulky Quantity() function. I'd like to define +- to be Quantity, something akin to this:

`&+-` := (a,b)->Quantity(a,b);

Sadly, 

1+`&+-`(2);