I was turning a block of Osage Orange last evening, about 8x8 inches. I was using a glue block made from a piece of 2x4 to hold it to my chuck, so I'm sure it was pine or fir - softwood, regardless. While turning, the glue block sheared off near the chuck's jaws. Is it self evident that only hardwood should be used for glueblocks, or are there times when softwood is OK - you know, to save money, use what is at hand, whatever? The block was undamaged, and still in the rough turning stage. Thanks for any info, Mike