Invoking Questions, Binding Foci, Invoking Table Options

[twilite]

My search fu is weak, but I couldn't find any mention of this:

1) Can a binding focus be used in the Invoking test? The BBB says it is added to Magic + Binding when binding spirits, while the Street Magic description of Invoking has its own Invoking test after a Binding test, but which also uses Magic + Binding. I think by RAW it can't be used, and it's probably just as well because it would make more powerful Great Form spirits, but I thought I would ask for opinions.

2) On the Invoking table on p. 57 it lists a lot of powers linked to results. Do you get all the powers and below or just the described powers if you get a certain number of hits? If you only get the power at the exact number of hits, that really is not very nice- you would have to get exactly the right number of hits to get anything specific, like the Great Form Power for that spirit type. That's what it seems to be saying though, because there is no mention of getting the results below yours.