I have found that the following adjustment settings has been added to rom update L-7. And are not present in L-5 or earlier:
A1.29 GI power Saver
A1.30 GI Power save level
A1.31 Ticket
A1.32 No bonus flips
A1.33 Game re-start
These settings are not described in the manual at game release so must have been added later. I dont know I there is an service bulletin update describing them but people asking for if its worth updating to latest release perhaps these additional settings are a good reason.