**Here¨s one!**
For what its worth it, I`m using this conditional 4-group system wheel with 16 numbers in 24 combinations, don`t know if it`s originally Serotic`s wheel but sure looks like one. As already was pointed out,the main problem is that you can hit big,and still win only some consellation prizes

as you can see below.

System is consisted from 4 groups with 4 numbers each:

01-04; 05-08; 09-12 and 13-16.

01-02-03-05-06-07

01-02-03-06-10-11

01-02-03-13-14-15

01-02-04-05-06-08

01-02-04-09-10-12

01-02-04-13-14-16

01-03-04-05-07-08

01-03-04-09-11-12

01-03-04-13-15-16

02-03-04-06-07-08

02-03-04-10-11-12

02-03-04-14-15-16

05-06-07-09-10-11

05-06-07-13-14-15

05-06-08-09-10-12

05-06-08-13-14-16

05-07-08-09-11-12

05-07-08-13-15-16

06-07-08-10-11-12

06-07-08-14-15-16

09-10-11-13-14-15

09-10-12-13-14-16

09-11-12-13-15-16

10-11-12-14-15-16

Guarantees:

-in any of 2 groups, 6 hits: min.2x5 and 2x4, max.1x6 and 3x3;

-in any of 3 groups, 6 hits: min.12x3,max.1x5,1x4 and 7x3;

-in any of 4 groups, 6 hits: min.8x3, max.2x4 and 3x3;

-in any of 2 groups, 5 hits: min.3x4 and 1X3, max.1x5,1x4 and 2x3;

-in any of 3 groups, 5 hits: min.6x3, max.2x4 and 4x3;

-in any of 4 groups, 5 hits: min.3x3, max.6x3;

-in any of 2 groups, 4 hits: min.4x3, max.2x4;

-in any of 3 groups, 4 hits: min.2x3, max.4x3;

-in any single group,3 hits: min. and max.3x3;

-in any of 2 groups, 3 hits: min.1x3, max.2x3;

Cheers