can you make an ofna spider diff from these two part sets
http://cgi.ebay.com/Hyper-9-Spider-D...item336798fc55
http://cgi.ebay.com/Hyper-9-Spider-D...item3f041bd89e
totalling $20 along with using the rest of the parts from stock ofma diffs or are there still aprts u will need and have to buy the whole $70 spider diff?
Want to try them front and rear in my muggy with my slipperential in the center.