This is going to be a learning thread for a few of us I guess. I too have watched the videos, however have not come to this on my project list yet. It makes perfect sense the if the resin set to quickly it wont have time to absorb, also there are different viscosity resins. I know it is possible to over clamp and starve out a glue joint as well. So what I'm trying to say is there could be multiple factors. It will be good when someone with experience comments.