Have not had a DBU in my hand, but for most tankers I know, diy is not too favored when involving expensive computers, which is exactly what the DMD/TO is. Get one wire wrong, or one drop of solder in the wrong place, and you got a $400 paper weight. The Impact system is a plug and play system OTB, ready to roll in minutes, and each piece is factory inspected and tested for operation with a DMD before shipping. Of course, no one is forcing anyone to buy the Impact system. The announcement was for info of availability time frame and price.