Disc brake caliper lever bumps into caliper body

Part 340-06 is required for the old plastic freewheels only.
Not necessary for the newer aluminium freewheels.

Typical issue; part 338 (magnet spacer) is broken very often but explicitly required for correct function of the magnet’s counterpart.
Together with three plastic washers (376) and one metal washer (469) will this system establish the tilt-function of the magnet’s counterpart.

Absolutely, also a typical issue - do not overtighten the wheel bolt 379!!!
I wrote an extra thread regarding this f… bolt - you can find it here
Tips from Mark.pdf torque warning!

No.

Again, there have to be three in sum, refer here for the correct parts sequence:

The three plastic washers and one metal are standard since ten years I can assure.