Thank you all for sharing your thoughts but frankly speaking for an S-Bus novice point of view it is getting more complicated.... seeing the various alternatives!!!

I liked stevekott approach which sounded fairly easy and would like if possible to elaborate on:
Going into details for the various functions how would you start your install and choose the layout and components needed if using non S-BUS servos (for the SM large Viperjet and The FB F-15E 1/7 scale)?
Can you still use standard servo extensions if needed to reach a hub or a decoder?

I know that at some point it will all start to make sense and be less confusing. The hole idea is to achieve a simple layout and reliable system... Hope I will be able to figure it all out soon.

Thanks

Regards,
Dany