[simplechamp]

As with anything it comes down to personal preference. I wouldn't mind a bit larger handles, but even with the small ones I can flex the steel shafts without really straining. Any larger handle would just make me more likely to break/strip them (I know I would strip a lot more of those tiny set screws if the 1.27mm or 1.5mm had a full sized handle). But that's me.

Anyway, if I really want to reef down on something I generally use an L-shaped hex key.