Point taken.. I guess no has tried making one of these, nor is anyone really interested in shelling out the money to make one.
While it is much cheaper and simpler to get a wired adapter, I just thought it would be nice to go wireless, especially since everything else is wireless too.
And while it is expensive, I was hoping to figure out a way to make the process less expensive. The person who posted the instructions has only made one of each controller and hasn't had a chance to minimize cost.
Either way though.. I guess I'm the only one here who would actually be willing to spend a little extra to put one of these together..