2+1 setup...HELP!?

Hi all, after reading through LOADS of previous posts i cant seem to find what I'm after (tho lots of other useful bits)...I am a watersports instructor who's spreading his wings and learning to surf by touch and feel
after owning a mini mal with a thruster setup for a couple of years, ive branched out to buy a longboard due to the usual small conditions where i live.
its come with a 2+1 setup...a few points I'd love some help on
1. i know that if i have all three, that should give me better grip and speed?...but can i use just the side fins and not the middle? and if so what does that do for the handling?
2. I'm looking to go old school and walk the board, nose ride etc...so is it just the single fin at the back? and if so, what can i do to the holes that will be left?
the side fins (bites?) are LOK BOX fins if that's any help?
any info is HUGELY appreciated and taken onboard as a student
thanks
after owning a mini mal with a thruster setup for a couple of years, ive branched out to buy a longboard due to the usual small conditions where i live.
its come with a 2+1 setup...a few points I'd love some help on
1. i know that if i have all three, that should give me better grip and speed?...but can i use just the side fins and not the middle? and if so what does that do for the handling?
2. I'm looking to go old school and walk the board, nose ride etc...so is it just the single fin at the back? and if so, what can i do to the holes that will be left?
the side fins (bites?) are LOK BOX fins if that's any help?
any info is HUGELY appreciated and taken onboard as a student

thanks
