Thrustmaster T300 Instruction Manual page 538

Installing the conical stop ("CONICAL RUBBER BRAKE" mod)
This modification (or "mod") is not essential, and is not installed by default. This means that the
brake pedal functions perfectly even if the mod is not installed.
This mod lets you experience a different feeling and resistance when braking.
It's up to you whether or not to install it, depending on your own preferences.
- Screw the conical stop (2) onto its metal support (1).
- Screw the position adjustment nut (5) onto the bottom (onto the conical stop's screw thread).
- Position the unit at the back of the brake pedal's arm.
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