Nice. I don't need quite so much space, which is the problem I've found with the hardware store stuff I've found so far - all the holes are located pretty far apart, like 1.5"+ centers, when I need maybe another ½" to 1" extension to get it down reasonably far.

I've only tried big-box stores so far, though - I'll try some smaller shops and maybe an LBS to see if they've got some spare bits.