Upgraded to Nismo coilover - how to adjust rear shock's rebound setting from inside?

[TitanZ]

Anyone with the NISMO coils know a compatible extended damper adjuster for the rears? No clue what size hex or length is correct, would like to order in advance and give to installer so I have easy adjustability from the get go. Thanks in advance.

 

[OptionZero]

Anyone with the NISMO coils know a compatible extended damper adjuster for the rears? No clue what size hex or length is correct, would like to order in advance and give to installer so I have easy adjustability from the get go. Thanks in advance.

the Nismo US coilovers are just rebranded KW's, i think, so . . .try those?