Foot, sorry to awaken this post but just had a question.

While bench bleeding, I fully understand to keep the resevoir full and push the piston in, and plug the 2 holes before releasing it.

However, how can I make sure all of the air has been purged out of the cylinder? Do I need to attach some clear tubing? How do I go about attaching the tubing tightly to those holes? Or perhaps is there another way?

Thanks in advance.