I think I made my first new purchase mistake for my Typhoon

So...
Should I just go with the less expensive CDI system, since the jib size is not what I wanted anyway?
For lighter wind, what do I do? I read on some thread that I could take down the working jib off of the RF and hank on a genoa--is that true? And if so, does one system lend itself to this task more easily?
I was really hoping for a nice jib/genoa size for light air downwind..... unless I'm totally deluded and none of this matters anyway. I do have a MPS so maybe just use that more?
thanks, hope everyone is having a great start to summer!
Kathryn