NP. And that looks great.
If you take your blank sig, with no splatter, then put the blood drips wherever you want on it, even over bales faces and texts etc, then put your default layer on top of that (with no blood splatter) and erase around the faces of bale, you'll see that it can work that way.
So.
It will be
Layer 1- Default sig
Layer 2- blood splatter wherever you want
Layer 3- Default sig
And then just erase around certain areas and it will look like the blood is behind bale. Also, the default size for a sig is 150H x 500W.
Oh, and to answer you PM, I just bough a season pass to BB last night off iTunes.