Cog is an absolute love letter to Fort Max and even without the weaponiser gimmick, it would have been a worthy edition to the line. The transformation is nicely updated and works well in all modes. The only flaw mine had and from what I've seen it may be common, is that the right fist in robot mode is too loose to hold his weapon. Fortunately the countless hardpoints on him, mean that it's easy enough to come up with workable alternatives.