--seq-max in hashcat plus?

[atom]

-q will not be possible inside any hashcat version, it takes to much of a special algorithm. But yes, you can feed oclHashcat-plus (I guess you're talking about oclHashcat-plus not hashcat since you posted in the oclHashcat-plus subsection). It's pretty easy:

./mp64.bin ?d?d | ./oclHashcat-plus64.bin hash