Scooterotica

just bought a new original inline scootrs discbrake.
adjusted it and tested it,- very bad breaking.
disassembled it, changed crappy pads for a pair of new newfren pads.
filed a bit, used a bit of copper paste around the pins and on back of pads.
bit better now, but still impossible to use in traffic.

any experiences or ideas ? should the lever mechanism be changed ?
the quality of the brake looks very good, it might be the messing like on some campagnolo brakes...