With v4.x OTS tune files, we only differentiate between CAT or NON-CATTED headers. There are simply too many headers on market to supply unique calibrations for all of them. To offset and create a tune file that is universal for EL or UEL header options, our initial IAM is now set to .7 (vs. the original 1.0).
Openflash Performance Off-The Shelf v4.0X: Stage 1, 2, 2+ and 2+E85 Hardware Requirements