question-- the new craftable sets that come out after this ---- do we still have to purchase those tables to feed into the grand tables ? or do we just take the grand table to the crafting site and attune it ?
You will still have to purchase the attunable stations.
Those get "fed" into the master table.
Thank goodness, otherwise, writ vouchers would become basically worthless, as attunable stations are basically the only items that you would purchase multiple times from that have a high usage. It would be a gigantic blow to the crafting economy were they to have done that.