Rod Sizes

OK, I have measured the rods I have. Three of them have the carriages
that came out of the donor machines, two of these have a rod diameter
of 0.35 inches [8.89mm] with a length of 15.28125 inches [388.14375
mm], the other is .392 inches [9.9568mm] in diameter, and a length of
17 inches [431.8mm]. The rest have no carriages, I have two at .235
inches [5.969mm] in diameter with a length of 10.5 inches [266.7 mm],
two at .275 inches [6.985mm], one has a length of 16.5 inches [419.1
mm] the other is 9.71875 inches [246.85625mm], and one at .305 inches
[7.747 mm] in diameter with a length of 10.125 inches [257.175mm].
What would my approximate work area be? I plan on using the rods with
the carriages on the X, Y, and Z-axis. Can I get away with just a rod
and lead screw per axis?