Hi Mark,
The Tornado jib "does" enable the boat to go to weather more efficiently than the MX jib. I was aware of that when I compared the MX jib to the stock P19 jib. A shade off the wind, the MX package has given me it's share of "knee-knockers". I sail solo most of the time. In a distance race a while back (with the Tornado jib) we were going to weather faster and higher than the fleet. That included a Taipan 4.9/chute and an I17R. (sailed by very good sailors) Both of which corrected out over us after we collected line honors.

I am anticipating "the complete package" (Slightly modified Tornado main, Tornado jib and Tornado spinnaker with an ever broadening grin. If it comes together like I think it might, it should keep me on the edge.

Haven't given the rating a whole lot of thought, just yet. I'll probably get the best number by starting with the stock P19 number and adjust for the mods from there.
Nice chatting with you. Appreciate your interest and thanks for the comment on the boat. She is well taken care of....to say the least. Attached pic
Dave