DAT72 density settings - V5.1B-3

Hi everyone,    Hope you are all looking forward to a Merry Xmas.

I have a new DS15 running V5.1B-3 ( ie: PK5 ) and would like to know
how to write tapes in DDS3 and DDS4 format.  The DAT72 drive ( Q1529A )
is supposed to be able to read and write DDS3 and DDS4.

The ddr.dbase file seems to be set up to only support 36GB and 72GB
densities.

Do I have to change the entry in ddr.dbase ?

Best Regards,
John Welsh.
==========