Those 8 piece sets with the bits that store in the handle are nice, but I can tell you that having separate handled hex drivers is way better when you have a lot of vehicles to do maintenance on. Even just "wrenching" on one RC will require different sized hexes and switching bits/shafts is a pain IMO.

On the other side of the coin, you could "chuck" them bits/shafts up in a power screwdriver to speeds things up when disassembling and reassembling.