Lens cap holder screwed to camera bottom

There exist already many lens cap holders, but most of them are attached to the camera strap. I found this not so practical, since when I hold the camera, remove the lens cap and try to clip it to the holder, the strap is moving and it's not so easy to hit the right spot. So my lens cap holder is different: it attaches firmly to the bottom of the camera via a bolt screwed into the standard tripod mounting thread.

By default, this lens cap holder is dimensioned for my Canon PowerShot SX-40