Rob DOHC, turbo going straight into the charger was my initial idea, and as you say there is no need for any control as such then, but there are other issues that I dont like, such as the amount of pressure the supercharger is exposed to in a system where the final boost delivered into the engine needs to be 40psi (absolute) or more.
Plus there are some SERIOUS heat management issues and for my particular application I really need to avoid masses of heat as I already have heat management issues due to the mid engine layout, thats the main reason I dont want a "true" compound charged setup.


Effectively on my setup it would be compound charged only during turbo spool.
So if you pulled away it would be:
supercharged only
then compound charged
then turbo only

Im fine with that, the turbo worked great at high rpm anyway on the previous engine, I just want something more before it spools and to help it spool a bit sooner to make the car more drivable at lower rpm.