Old or new best navcore is original one..... not any "home made" needed if some one is happy now.
This is not any competition ( like MY is better than any other ) to who makes better navcore or something else.
eg. I use 8.010 navcore in my old XL, I not see any reason to change it to something else
YES.... some one want to change navcore if need IQ and ALG, but no need always use MY navcore packs.