Save the dawn for your dishes!!!
I had to bleed the clutch line on my car after re installing the trans mission. well the other week I was at meijer (think wal-mart) and there in the hardware section was a door stopper to keep a door knob from going through the drywall. looked to be the perfect size for the mighty vac and brake resevor. for 1.17 I gave it a shot. took of the double sided tape and drilled a 1/4" hole in the middle. works perfectly!!!! here is what it looks like