I thin for fined something with Kanagaroo, is only 1 method - split ranges, mak many file move all to 1 bat file and search byte to byte. BECAUSE RANGES IN KANGAROO IS NOT REAL RANGES !!!
Because with rages from "0 to FFFFFF" blablabla

ranges privkey fined impossible.
p.s. And if you thick what your 5000 Mkey/sec GPU can fined someone in range - NO , YOURS GPU NOT SEARCH IN RAGE !!! YOUR GPU SEARCH ONLY LAST BYTE IN TXT FILE SETTING'S' !!!!!! ONLY LAST BYTE !!!! What do you mean?
If you start at 0000000000000001 and want to end at FFFFFFFFFFFFFFFF, the program will search entire range.
I will make test and show you, standby.
proof please ? Im very disappointing news about if key 25 byte, range from 0 to 50, THEN WILL NEWER FINED PRIVATE KEY !!!