I have to admit that with the help of Plug-in Hive support I was finally able to get the Multi Carrier Shipping Label app functional. Their support team did behind the scenes updates to the plug-in to get it to work correctly with USPS rates and box sizes. It's a bit cumbersome using cm/kg for packages, and inches/pounds for products, but attention to detail is always important.
It's the least expensive for the service provided. The site will go live in a few days and I'll report back how well it works. It was a bit of a challenge getting it all working, but it seems like a doable alternative until Shopify incorporates this feature into the basic system functionality.
Great to know that the Multi Carrier Shipping Label app helped you solve the issue regarding USPS rates and dimensional shipping. Waiting for your store to go live and see how well things work together!
Also, please feel free to contact our support in case you face any issues with setting up the app.
To share an update on this topic. There is no change or update on this feature request currently, but our development team are aware of what is being asked and are thinking about/looking into solutions for it. We will be sure to share an update on this when there is one.
If we can avoid speculation, and provide constructive feedback that would be great! And as mention the moment there is more to share we’ll be sure to update this topic.