Simplest way to move objects from the default partition and route domain to a newly created one

I have a pair of LTM only boxes that were originally meant for a small group of production applications for the same client. Later on the same client requested a separate 'Test' environment, which we created as a new partition and route domain with strict isolation. The problem with this setup is that even if you are working on the 'Test' partition you still see all the objects in the Common partition. Since we're about to replace those boxes I would like to move all pools, profiles, virtual servers, etc. in the Common partition and route domain 0 to a newly created partition and route domain. I saw some posts for v10.x from a few years ago, but I figure that there might be a newer way to accomplish this. The current boxes are running v11.6.0 and the new ones will run v12.1.2.

Some of the articles I've read so far: https://devcentral.f5.com/wiki/advdesignconfig.migrate-objects-to-a-new-partition-and-route-domain.ashx https://devcentral.f5.com/questions/template-for-community-copy-rename-and-move-to-partition-your-objects https://support.f5.com/kb/en-us/products/big-ip_ltm/manuals/product/bigip-system-folders-administration-11-6-0/2.htmlunique_550025311