Here's the way mine runs:-
Aerial goes through a CB filter (because the cops play hell with my TV) to a booster ('cos the signal's crap) and goes to RF IN on my CCTV
From RF OUT on CCTV it goes to RF IN on my VCR
From RF OUT on my VCR it goes to RF IN on my DVD recorder
From RF OUT on my DVD recorder it goes to RF IN on my Digibox
From RF OUT 1 on my Digibox it goes to the main TV
From RF OUT 2 on my Digibox it goes upstairs to RF IN on a tvLINK T180 8-way booster (this is compatible with magic eyes, some amps require bypass kits)
From the T180 it goes to the a load of SLx magic eyes, each on their own TV
This gives me the following channels:-
0 Aiwa VCR (one room only - it's got its own VCR)
1 BBC1
2 BBC2
3 ITV1 Wales
4 S4C
5 Sky
6 VCR
7 DVDR
8 CCTV
In this setup the 12V output from the Digibox is switched OFF, as the T180 will power the eyes itself.
I would NOT recommend using the SLx8B amplifier. I had one of these, it overheated and the transformer melted its way through the case!
T180 was purchased from CPC, you may be able to find it cheaper elsewhere though.
As an aside, I picked up this little tip earlier. If you've been let down by one of the big high street electrical retailers, go in and find the Sky remote. Chances are they'll have magic eyes dotted around that pick up the signal and beam it back to the digibox hidden in the back room. Click SERVICES, 4, 0, 1, SELECT, enter the RF menu and switch the "2nd outlet power supply" OFF. This'll shut down all magic eyes and chances are nobody in the building will know how to switch them back on. Or change the RF output channel which'll require either resetting (if they have a TV hooked up with SCART) or a retune of every TV set on display (if they don't).
For less chance of being caught, use a PDA with IR remote software instead of their Sky remote.
Oops what have I started?!