Perhaps the heat (hah, right!) is getting to me? Anyway, yesterday I decided to embark on two fairly random bits of model making madness.
I tried to gingerly pry his whole arm off, but it looked like it'd simply snap orff in the wrong area. So I got a spare arm with the right apparel, chopped out the appropriate part (forearm to wrist) - flying by eye and seat of pants - and repeated this process on monsieur le sabreur.