I added the following in the Tips:
"Frame Traps and Links
(L)= Link
1. st. A, cl. C (L)
2. st. A, far C
3. st. A, cl. D (L)
4. st. A, cr. C
5. st. A, cr. D
6. cr. A, cl. C (L)
7. cr. A, far C
8. cr. A, cr. C
9. cr. A, cl. D (L)
10. cr. A, cr. D
11. cr. B, cl. C
12. cr. B, cl. D"