BellBoard

1246375    1   2   3   4   5   6   7   8   9   10
--------------------------------------------------
1354726            -   s   s   s           -   s
1765243            -   s   -   -           -   -
1632475            -   -   -   -           -   s
1354762            -   -   -   -           -   s
1725634            -   s   -   -           -   s
1642375            -   s   -   -           -   s
1453762            -   -   -   -           -   s
1725643            -   s   -   -           -   s
1236475            -   -   -   -           -   s
1254763            -   s       -           -   -
3751642    s   -           -   -           -   -
2357416    s   -           s   -           s    

Start with rounds as last row of a slow six
1246375 is the end of the first six rung, which is a quick six
Cyclic part ends, the first one being 2345671 at end of slow six.