Recenty the topic of square vs. round dog holes came up (again). It seems that each time people make the argument that round dogs allow you to do odd clamping. Round dogs can do this, but so can sqaure ones. Today I had to hold a "pointed end" workpiece.... something that could not be held easily by either a round or a square dog.
The solution was a custom holder fitted to both the dog and the workpiece. It took me about 120 seconds to fish through the scrap bin, scribe the workpiece, the dog, and to cut it to shape on the bandsaw.
Pics posted to ABPW.
To be fair, I have both round and square holes on my bench. I use the round holes with hold-fasts to apply downward pressure but generally not for lateral clamping.
-Steve