Bob Holcomb is a friend and associate of mine - he really does some great stuff! We have a complete twin turbo design for my CLK320.. as complicated as it is. The mechanics of installing twin turbos is not that difficult. Its all the computer related 'letters' that might give you headaches. We designed ours with a 'piggy-back' Fuel Injection system that overrides the stock computer, yet lets it do all its other functions.
Most of the parts used are a careful (and secret) blend of 'stuff' we had in the race shop...and it all fits together nicely.
One day I will have the time to actually install it!