sail design

I know with the condition of my E35-2 I should be focusing the hundreds and thousands of dollars going into it so so often, into things that enhance performance and safety. I also feel like you have to take little wins that make you feel all warm and fuzzy inside when you can. I drew up this...

I am in the process of speccing a new mainsail for an E35-3... which is definitely a learning experience (this will be my first purchased sail). For those of you that have 3 reefs (or 2 with one very deep), where did you specify them? I am told by a sailmakers that normal is 12/24/36% (up luff...