Ok, I have to agree with Tiger on the 15 figure.
I cannot find any cases of more than 15 PGP's, even when I put
in a simulator patch to look for them.
However...
Tiger say, "It takes 30 points to finish
this one. Ironically, there are longer games, but we'll do that
one some other time.".
Sorry, Tiger, "some other time" is now.
As I see it, it is a fairly straightforward matter to show that
30 points is the Spec 7 max.
You don't need a rotation board, a computer, a calculator, or
even paper and pencil.
In fact, it's so easy, Even a caveman could
do it.