500u BR, 4.5/6D S17 DAS Backcount 0
1u @ 0, 2u @ 2, 4u @ 3 & 6u @ 4

Using CVCX canned HiLo I18 I get ROR 9.9 & Score of 22.31.

Using HiLo Catch 22 (except for 10,10 v5 & 6) and index numbers per BJA I get ROR 6.4 & Score of 30.68.

Have I done something wrong or could the revised index numbers and additional play variations be that beneficial?

AZ