Okay, so there's been a few discussions about half-radial rear wheels (where the non-drive-side spokes are laced radially, whereas the drive-side spokes are the normal cross pattern). I don't mean to repeat these discussions, but rather want to raise a specific question.
First, the background: Sheldon Brown makes a plug for half-radial rear wheel near the bottom of his wheelbuilding page. Here's what he says:
One of the major problems with radial spoking is that the spokes pull directly away from the spoke flange, and can more easily tear out of the flange than with tangential spoking, because with tangential spoking there's a lot more aluminum resisting the pull of the spoke on the flange hole. For this reason, radial spoking voids the warranty of a lot of Shimano hubs (although Shimano makes some hubs that are warranted for radial spoking, with somewhat altered design).Originally Posted by Sheldon Brown
Radial spoking the non-drive-side of a rear wheel would technically void the warranty of most Shimano hubs, but should not be a practical danger because non-drive-side spokes of dished rear wheels are significantly lower tension than drive-side spokes.
Sheldon notes elsewhere that even non-warranted Shimano front hubs can typically be built up radially, at lower tension, and with no danger, and I assume that this would translate to the rear non-drive-side spokes. But I'm not sure - is there good reason to think that radially-laced non-drive-side spokes pose any danger to the flange of a forged hub shell (in my case, used Shimano 105)?
Sheldon also specifically recommends (in the text that I quoted) half-rebuilding a rear wheel with radial non-drive-side spoking, so I don't think the worry of stress risers from spoke-indentations from previous tangential lacing on used hubs is much of a worry.