Pneumatic brake wind back tool

So after the Merc sarga and lisening to rocket I have found one and invested in it. used it today and found that the tool is bulky and still falls short as the manual version does when you come across pistons that have expanded too far out because pads have become metal to metal. If that were the only wind back tool I had today I'd of been looking for the large waterpump pliers and a G clamp to help push the pistons home. With all the modern thinking and technlogical break throughs you'd of thought that somebody would have come up with a caliper design that prevented the pistons popping out too far in the time and experiences we live in!

The tool I invested in today still requires manual operation to use it even though it is pneumatic. Will be interesting to experience what it will be like when I get a caliper that has a tight piston that needs returning home?