Furthermore, it allows to access different character sets (up to 32/64/128), kernals (up to 16/32/64) or basics (up to 16/32/64) or a combination of these three ROM typs which can be selected via DIP ...

The only version of C64 BASIC is from 1982 and uses the old checksum. The -03 version of the KERNAL is from 1983 and uses the new checksum. Any ROMs after 1983 (so also all ROMs we create today) ...