Hey Guys. I'm about to do the unthinkable, bleed my Juicy Ultimates. Gulp! I picked up Avids 2008 Bleed Kit, been reading inside and out in the my sleep the instructions. About to take the plunge. It keeps mentioning this "Bleed Block" however, something you put where pads are after you remove the pads to prevent the solution from getting in there. Where the hell do I get one?! It never came with the kit! Is this even necessary to do and if so would my lbs have one? Thanks.