Step 8: The front axle
Measure in 6.5" from either end of the plywood strip and mark the holes to put in the U-bolts, the same as you did for the back axle. Also, mark the center of the plywood strip.
Bolt in the U bolts and put the axle through them. Go ahead and tighten down the nuts and put on threadlock. Now, center the 3/4" flange over the center mark you made, and mark location of the four bolt holes. Make sure the holes will clear the shaft on the other side.
Drill out the holes and mount the flange onto the plywood. Use the 1/4-20 bolts and tighten 'em down real good. Put some threadlock on the nuts.
sweet! You've got a front axle.