Never ran into a hex bolt rear what car is that on? I can't visualize it do you use a socket?
Miata's, for one.
Yes, I mainly do my own brake work 99% of the time (and for friends, family and the neighborhood clueless as well).
Year's ago I ran into a pinch for time for fronts on a car I then owned and let my local repair shop do the work while I bought the parts.
Was having fluid loss and issues on the front end re: stopping and pulled both front sides soon after they completed the brake job only to soon find the problem on my own.
I fixed the problem and then stopped back in the shop to get a better understanding of what they saw and how they did thier brake jobs.
They had several spreaders but due to trying to be speedy and all crafty, usually used channel locks for piston retraction as the caliper was heavily marred where the other side of the jaws grabbed.
Owner said they sometimes see returns with torn bellows problems but the O-ring "should" keep the fluid in.
All I.m saying is using a good or correct tools keeps collateral damage to a minimum.
Last summer I had a buddy help me install a new crank sensor in one of my cars. He's one of those brute force guys that tends to do more harm than good. End of the day from his tugging and prying he broke off my dipstick tube and cracked the distributor shaft where it goes into the block due to his using wrong points to anchor a pry bar when prying while I was under the car.
Added $300 to the cost of an orignally $75 in parts job.
No good deed goes unpunished.
LOLZ.