Bruteforce LM

[Mem5]

Hello,

Few question about the LM implementation when bruteforcing :

oclHashcat-plus64.exe -m 3000 hash_full.txt -1=?d?l?u?s ?1
oclHashcat-plus64.exe -m 3000 hash_full.txt -1=?d?l?u?s ?1?1
oclHashcat-plus64.exe -m 3000 hash_full.txt -1=?d?l?u?s ?1?1?1
oclHashcat-plus64.exe -m 3000 hash_full.txt -1=?d?l?u?s ?1?1?1?1
oclHashcat-plus64.exe -m 3000 hash_full.txt -1=?d?l?u?s ?1?1?1?1?1
oclHashcat-plus64.exe -m 3000 hash_full.txt -1=?d?l?u?s ?1?1?1?1?1?1
oclHashcat-plus64.exe -m 3000 hash_full.txt -1=?d?l?u?s ?1?1?1?1?1?1?1

1) charsets ?u and ?l are the same for LM algo ; which one does oclhashcat use ? small or capital letters ?
2) Can I stop the bruteforce to 7 characters ? Or should I go until 14 ?

Thank you