Looks like an innovative solution to getting over the obstacles
You might want to be careful about your choice of axle material, 1/2 inch Churro shaft really isn't known for being a good material for live axles, it is very useful for spacers and stand-offs, but not for things which take a lot of load.
This thread has a little bit more information
http://www.chiefdelphi.com/forums/sh...xle+materi al
If you have can afford the time and have the weight, it would recommend the switch to 7075 1/2 Hex shaft(Available from WCP/VEXPRO/Andymark) before your North Bay Regional