I'm needing to rebuild the rear caliper. Slowly leaking and not holding pressure. I got the kit and read through it. They mention a special tool, of course. Can this be bypassed by simply removing the caliper and pads, putting something between the pistons and slowly blowing air into the caliper to get the pistons to move to the point I can remove them by hand? Should I go ahead and separate the caliper and do each side separately? I'm thinking if this is the case then a bag might be in order. Put each half in the bag so pistons don't go flying and bouncing all over the garage. This is on a 2001 Softail, stock calipers.