I have the practice sail and class legal sails, you do not have use the same amount of vang. Sailing upwind I just snug it up and that seems to work. I almost never get the sail block to block, mostly 6" apart.
It looks like you can pre order the sail from West Coast sailing for 530.oo dollars. I used the new practice for 6 months and the shape is still great. It's not any faster but it's going to last a lot longer.
It's hot a problem on class legal sails, and it won't be as bad after the sail breaks in. I sail in summer afternoons where the winds are normally 15 knots and the Intensity sail will last about a year. I wish I could say that about the class sail.