This contribution looks like it might be adaptable for my situation.
Originally Posted by numinix
I ship flammable liquids which are limited to shipping by either USPS Parcel Post (up to 16 fluid ounces) or UPS Ground Service.
When the checkout page shows both options, customers often select the cheaper (usually Parcel Post) service despite the fact their order exceeds the 16 fluid ounce postal limit. In those cases, it is preferable that the Parcel Post option not be displayed.
It's easy to correlate the number of fluid ounces to the shipping weight because our product is available only in 4 ounce or 32 ounce containers.
We can ship up to four 4-ounce bottles (16 fl oz) by Parcel Post. The shipping weight for 4 four-ounce bottles is 1.625 lbs and ships at the USPS Parcel Post 2 lb rate.
The shipping weight for a 32 ounce bottle is 3.8 lbs and ships at the UPS Ground service 4 lb rate.
More bottles of either size should ship by UPS Ground.
So my criteria for the shipping estimator/shipping options display are:
Order total < 2 lb then display rates from USPS and UPS modules
Order total => 2 lb then display only rates from the UPS module(the actual services, Parcel Post or Ground Service, are preselected in the respective shipping module configuration.)
Do you think this contribution can be adapted this way?