Iphone 4 / 4S for generic tripod mount (FDM friendly)

My old Iphone 4 works great for time lapse long printing process.

Tho there are many tripod mounts for iphone 4, I didn't want to print many parts then assemble, or buy threaded rods, suction cups or various hardware which I don't have right now, for just mounting an Iphone to a tripod. Nor I wanted to have it only partially secured in case someone trips onto the tripod while taking time lapse for 18 hours or more.

All you need is half an hour and a generic 1/4" hex nut.

So simple, so effective.