Thanks man! glad you like him!
to make them taller I:
.Placed their lower legs further down on their knee joints and then sculpted new 'knees' to fill in the gaps. (Also I drilled new holes to keep the articulation).
.Modded their heads to rest higher up on their neck joints.
.Drilled slightly bigger holes in the upper elbow joints to make their arms hang lower down. (Iron Mans 'new' sholders helped with his extention).
If you look at these pics you can see what I did now that you know.

This is very cool if you don't mind how did you extend to make taller I saw some at the store but passed them by going to get some now.so cool