piviot ball stuck in lower arm

[Serum]

No metalmen, titanium isn't that good.. With aluminum arms, i would not take titanium balls. it will bent and get back to it's original shape, but the movement it can make is very small. It will break at some point. steel is the best material for pillowballs in combination with aluminium arms. The UE's have got a hex on both sides. if they brake, you can still get them out.