Goal was to bleed the rear hydraulic on my neighbor's commuter — a Shimano MT200 lever and caliper gone spongy over eight months of wet commuting, lever pulling almost to the bar on a descent.
Set up on the bench with the wheel out and the caliper level. Shimano SM-MM-1 bleed kit: funnel, syringe, genuine mineral oil. Not improvising the fluid — DOT cross-contamination dissolves the seals. Nitrile gloves; mineral oil stains everything.
Pulled the pad, inserted the bleed spacer, confirmed both pistons moved evenly.