as said as before, anti-popup caster armor is pointless on a hammer. if a popup gets under you, you are most likely dead because it can knock some other stuff out, such as wheels, plows or wedges.
also it's probably pretty heavy, a.k.a. at least 60kg. not worth the weight; if you are worried about popups, try to make the wedge even better. THAT'S your primary defense against them.
and yes, needs more drive