225 /6's created equal?

In post #14 (peanut head) you can see the plugs screwed into their recesses if you look real close. The plugs are painted blue to match the head. In post #16 (drool tube) the plugs screw into a boss that is behind the hole the person's finger is in. The tubes sandwich between the plug and the plug boss inside and have a lip that seals to the edge of the hole being pointed to (in theory). Clear as mud yet?