Has anyone here fitted a reverb to an E120?

The options for routing the line for the switch isn’t great.

Currently, I have the line running along the top section of the frame with enough slack to allow the post to move up and down. I have (temporarily) secured the line on the top with two zip ties and then hooked the line up to the rear brake line near to the head tube.

This isn’t ideal as it will rub the frame and it looks a bit crap.

Any good ideas?