Roger,
that sail is taken from my stack of Johanna 60 master sails, in this case with AR = 2.13.
I don’t generally make detail plans for all four sheets unless I am to make the sail myself.
Instead, I suggest you print out Chapter 4 and 5 of TCPJR and then Sheet 1 and 2 of the Johanna 60 master sail (two of each).
All of these are found on ’my’ page: The Junk Rig Association - Arne Kverneland
Sheet 1 will be the basis for Sheet 1 and 4, while Sheet 2 will be the basis for Sheet 2 and 3. Read through Chapter 4 (Fig. 4.2) and you will see what I mean.
Since the battens will have the length of B = 3.00m, you will have to scale down every dimension on the master plan with a factor of FL = 3000/5077 = 0.5909.
The needed Round to get the right camber is picked from Fig 4.5. In this case you should end up with R = 19.8 x 0.5909cm = 11.7cm.
I guess you may well use the mast with its original mast rake. To avoid bending the mast top too much, I would move the halyard down the mast to just get enough halyard drift.
I guess Ø22 x 2mm should be plenty strong enough for the battens, or Ø22 x 1.5mm, if you can get it.
Good luck!
Arne