So thanks to some recommendations in another thread, I got a new saddle, but now I have a new quandry. I want to attach my rear blinky to it.

My old saddle had some springs and extra rails that made a good place to zip tie the blinky, but my new saddle just has the two parallel rails running the length of the saddle. I want to attach the blinky to the saddle because if I attach it to the post it will be hidden by the trunk when I have the trunk on it.

I have another light (not as bright but it does have turn signal blinkers a brake indicator and an attached horn and was a gift from my wife so I don't want to get rid of it) on my rack, so I can't put it there. Just looking for ideas on how best to firmly attach it to the seat. My last zip-tie attachment job looked ok in the apartment, but after the second or third bump had the light drooping and eventually facing straight down (not much use for safety on the ride.

Any suggestions?