Has anybody ever converted a FWD [DSM] to an AWD [DSM]?

Most people who research this topic come to the conclusion that it is cheaper to sell the FWD and purchase an AWD DSM, rather than attempt to convert the FWD to AWD form.  Road Race Engineering has done this; the cost is $6000. 

With AWD DSMs running in the $1500 - $8,000 area, why would you want to do this? Do yourself a favor and just buy an existing AWD.

Important: DSMs are cheap. Just buy what you want.