I've used electrical tape in the past which worked really well also, however I'm trying to go for something a little more stealthy as zip ties or the tape would be obvious against the fork and I really like the colour so I'm trying not to spoil it if possible.I used to use zip ties on mine which worked fine. When I built up the Wayfarer I decided to just wrap the wire around the fork leg with no other 'fixing' and it's holding just fine. Might be worth a try.
I've used electrical tape in the past which worked really well also, however I'm trying to go for something a little more stealthy as zip ties or the tape would be obvious against the fork and I really like the colour so I'm trying not to spoil it if possible.