Rollinz, yes im very aware of all the possible different configurations of charger and turbo and which feeds the other or both side by side etc, its just the details of exactly how to simply control the switchover with readily available parts that is what its not so easy to google it would appear.

Not interested particuarly in things like declutching the charger as its just not going to offer any benefit really for my particular application as I dont care about fuel economy etc.

Just want to find a smooth and simple way to allow the turbo to breathe more air than the charger can supply when its spooled and for the charger to supply the engine with moderate boost when its not.