@CDB Hi C, your use case is a common one and I’m still working on this. I’ve had multiple phone calls with merchants in the past few weeks talking through very similar catch weight use cases of needing to edit the order afterward to adjust for overcut, and candidly this is a pretty complicated one!
In the meantime you may be able to achieve what you want manually with just Shopify’s native Edit Order functionality, but unless the authorized amount is higher, you’ll have to invoice for the difference. Also if you use local delivery or local pickup, apparently you can’t edit the order (not sure why this is).
I’ll update this thread when I’ve made more progress.