I have scratched aluminum as a choice, so wondering to go tube or solid steel? This is not a all out build so would a solid axle really hurt me that bad with performance? Is their like a standard or common width to use? What about the keyway issue for hubs and brakes and stuff? Get a keyway machined where i need them or do they come with a keyway the whole length of the axle? The hubs i have are for 1 1/4 axle and they have a keyway and a squeeze bolt is that enough to keep it in place from moving side to side in cornering? I know i know lots of questions any answers would be appreciated!! Thanks!