KW c500 double set back tandem tandem 8X8 help

[Jakyat]

Thank you Neil, and Tim
I went through that thread last night. Interesting! Will definitely be a good resource when I get to the suspension /steering part of my build.
Hats off to you Tim, if youre listening, nice build. Must of taken a long time, and a good banker to build that rig. I was not aware that the road trains had auxiliary drive in the trailer(s). Makes sense though.
I'm still stuck on which axle kits would be best for my application. Like I mentioned, I would like my truck to be 8x8. Which ever way I go, I need to place an order soon. My truck and frame rails will be here any day now.
These are one option:
http://www.rcbrmin.com/8×8-drive-ax...ml?cPath=66_67
What opinions are out there on these? Look like a direct fit into the tamiya line up.
Can any one tell me where the best place to order these. I thought I seen them on eBay once, but I can't find them on there again. I could order them right from the rc brmin site I suppose.
This is my other option:
http://store.rc4wd.com/Blackwell-X1-...xle_p_451.html
These are cool, but expensive. They lookalike they would be challenging to mount.
Does anyone have any experience with either of these two?
Any feedback would be greatly appreciated.