Securing a router to a surface

[PiKe]

Can anyone suggest what I might use to temporarily secure this router to the bars?

I was thinking zip ties in a X across the whole thing?

 

[PiKe]

Saddle shaped?

 

[PiKe]

I can't get zip ties anywhere near tight enough.

I don't want to use duct tape, any other suggestions that I can grab from bandq?

 

[PiKe]

Long cable ties around the router to form two bands top to bottom in line with the upright bars. Then use smaller cable ties to fasten between the bands and the bars.

This method worked, seems to make enough friction that it doesn't just slide down.