Hi, I have started making phenolic ferrule/tips using the black linen phenolic rod from Atlas. First question - should I be using the canvas instead? My first attempt taught me to round the edges to avoid chipping. On my third unit, I decided to drill a 1/16" hole to provide glue relief (I use 5 minute epoxy to secure the unit). Unfortunately, that unit shattered. Did the hole cause structural failure, or, is it just the wrong material? Thanks for any help offered, I REALLY appreciate the information and knowledge shared on this site, it has HELPED me ALOT.