nothing up my sleeve
Well, unless you're you're building some giant T-90-like system, it's all pretty simple.
How many LNBs and how many receivers did you plan to use?
That drawing supports 8 LNBs, and 4 receivers, as-is.
If that's sufficient, then you're done! -

And there's nothing tricky, clever, nor difficult about the switch setup in the receivers, either.
To expand it to 8 receivers, you'd need multiswitches with 8 outputs, eg: 4x8's
That, and more 4x1 diseqs, and you're done.
To expand to to more LNBs, only then would you want diseqc switches with more than four inputs.
Seems like any old receiver can run 4x1 diseqs, and of course those switches are dime-a-dozen.
Many receivers cannot run 8x1 diseqs; they're a lot more rare, more unique, and more expensive.
Oh, the other limiting factor of that design, is that all LNBs need to be Standard.
No Universals allowed.
Well, they could be accommodated, but for each Universal you used, that would cut down by one, how many total LNBs you could have.
. . . and there'd be a minor hardware change . . .
But let me tell ya, if 8 LNBs, and 4 receivers would get 'er done, this is a simple project! - :up
. . . if you don't mind making up lots of little RG6 jumpers. -
