Thanks for the reply DevilFish
Its as early as it can be really, well as far as I know

.
I think the problem lies at length of cable + total splits.
Eurovox works 100% Downstairs, I used it to scan for channels
The external box is on the front of the house but enters upstairs at the rear, split --->Booster then back to the front of the house for the bedroom.
If i dont have the booster, I get no signal so it
is working and not just amplifying the same noise, fine tuning it with Slope might just crack it, but its a time thing, and the fact its in different rooms!
How do I go about adjusting slope/gain for the most thorough results?
Both min: Increase Gain slowly, see results
If nothing, increase slope slightly, increse Gain again
Repeat as necessary?
Or is there a simpler / more productive/effective method?
Thanks again.