[The other Sean]

Solid words from Jen.

Also, don't be afraid to watch a few YouTube videos or Google search. I've had great success over the years typing in the vehicle I am working on and the operation I am about to perform in to the Google/YouTube search. I did this just the other day before I went to replace a headlight bulb on my wife's car. Even though I have been wrenching on cars for 25 some odd years, it was still helpful. Without the search, I would never have thought to look for an access panel inside the wheel opening and would have struggled from the top side.

 

[The other Sean]

The tool in discussion has been on my "I should get" list for probably 20 years. Each time I pull out my C clamps and fiddle with getting things lined up just right so I don't wedge a piston in it's bore, I tell myself I'll get the tool for next time....

So, yes, C clamps work, but, a dedicated tool that doesn't rely on the outside of the caliper body to line up correctly would be better.