I just found out that the tool I used to align NEI dumps between the two mod packs doesn't process ingots correctly, because the information ingots is missing from item dumps. For example, tin ingots have id 20267:65, but this is not listed in old nei. New mod pack maps 20267 to invar leggings, which is of course wrong. It seems more and more that it will be shorter to reproduce the map, block by block, in creative mode, which will take me months, literally, to do. Seems we are hitting a wall with computers; it proves in practice to impose A LOT more manual work than any previous devices, while its intent was to automate!