Allow me to underline that I wasn't commenting on the jib as I assume that you solo sail the P16 with just the main. In that case working the mainsheet like I described is definately the route to take to fast tacks.
I agree with Rick that backwinding the jib is a speed killer and unnecessary. I it however a good "i'm in irons anyway how do I get out"
Put learn to tack without the jib backwinding and working the mainsheet (Tight all the way went pointing straight into the wind and realease immediately after that)
Wouter