That was about the most crappy, struggles with the assembly, brings up steel brushes to ruin the finish, has no clue about the groove, keeps moving that nipple 30 times and no pedal... And did you see it was not the pins, has the same style pin guides as the rear? Ready?
1. Look how easy they pulled the pin carrier. So that more or less floated.
2. Look how stuck the piston was from not retracting as in square to the groove.
3. Look how much force was used to install the piston and you know the key to that smooth move, I can push it with one finger or more like thumb the piston back in... NO CAN DO! That was one dirty groove and that was the whole trick to drag... You didn't see it, bud, no offense I'll keep repeating.
1926 dude, you should have caught that right away. Are you sure you have the eyes for the diagnostics? No offense, but you start playing wit day big boys and days is going to come down hard on the abstract... Did you say you as in; you used a steel brush on brake parts that have a machined mirror finish?
Rule #1 was... tell me you didn't take the finish out like those clowns!
Dude 26 guy, you ever bleed brakes? You're not one of those cloguys pushing titty pumps, when the squeeze is open once, close once with or without the mityvac? If that's not you and your number one tool is one of those hand jobs... How is it I'm going to start cleaning up your act with that crap rebuild vid for starters?
See the pattern yet?
I can see it from here, pal.