This is an accepted solution.
I may be looking for an answer to the same question you posed sometime ago. As a K-BID independent affiliate, most of our shipments are made via Spee-dee, mostly parcel size and some LTL. We also need integration with Shopify for other online sales, most of which will go FedEx Ground.
Assuming I understand your earlier question correctly, did you find a shipment management software that works for you, allowing you to integrate Shopify on one end and Spee-dee on the other?