Nate Doyle wrote: Title pretty much says it all. But specifically I'm curious about proper spacing and at what point does it become overdone?
Just like a ladder, one per foot! Seriously, it all depends on the climb and the holds that are available. If it's a blank, 5.impossible face, then you need to be able to reach each piece from the high point on your aiders at a minimum. If there are holds that you can use, then maybe more spacing is needed to keep as much free climbing as possible between bolts. It's a very touchy and variable subject. If you are not the FA, then you need to find out who is and ask them before you piss someone off and bolt a face that was designed to be free climbed.