Bill what I am doing to better distribute the vacuum is using a 3/8" dowel wrapped in breather material that crosses over the kerf pattern. You are correct about the kerfs being the main conduit for the vacuum. I am also trying to get the vacuum port to be very near this dowel and breather setup. Applying the plastic film to the yellow sealer tape is one of those jobs that would be much easier with another set of hands, but in my case I'm working alone most of the time.
Maybe by the time I am done with this project you will have fully trained me on how this site works. So we have lots of time for training.
