I've been on roughly 8 I20/N20 over the years and the spinnakers are rigged 8 different ways.

What type of snuffer do you have? Mid-pole or end-pole?
Spinnaker - two patches or three?

DO you want to adjust the head/foot of the spin separately or just yank one line and have it go up/down?

Just some of the questions you need to think about before you set up the spin arrangement...