5 is just not enough! UPS has 4 levels 1Day,2Day,3Day and Ground and USPS has at least 3 levels 1st Class, Priority and Express so that is 7 if you use both services just in the US. If you ship internationally more are needed. When you have packaging that is constantly changing like we do using entered weights is more time consuming than it is worth due to the maintenance. 10 or more flat rate shippers would be awesome!!!
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