Steve B wrote:

I am curious... what amount of altitude are the different gliders able
to get from a high speed pull up? 15 m 18 m 25 m?

Neglecting drag and other minor inconvencies:

m/2 v1^2 + mgh1 = m/2 v2^2 + mgh2

I think I can leave the rest to you. (Hint: It's something between 100m
and 150m, depending on v1 and v2.)

Stefan