You guys ever try one of those skate tools with the bearing press on there? Pretty dope. It makes it too big to carry but I just kinda keep it as my at home tool and it works out nicely.
I have one, or should I say I have lots, one in every place I have to fix boards. I know there are a few options, but the Reflex tool / Indy tool which has the press and the axle rethreader and they are amazing, but to put bearings in when building setups, I find it a whole lot easier to spread the pressure over both palms of my hands pushing down on the wheel on the axle while the board is on the floor. It takes half the time too.
Also I know when people have put bearings in but are a bit off center, this way I can check they are spinning correctly on the axle.
These really are the best all round tool I have, mainly for the added rethreader, but it is solid and doesn't bend or break.