Work continues on Humber

Work is continuing on Bronco Humber. Have run into a couple of issue, the use of most PE parts is not covered in instructions, and I have only discovered some of their use by reference pictures. If any one know what some of the other PE parts are for, I would like to know, especially parts P6, P18, and P33, as I have not been able to recognize them on any reference pictures.

!(https://lh6.googleusercontent.com/_DhvCi5rMe9k/TXt27pgcMvI/AAAAAAAAAGE/t8XK80FYn-A/s640/Model 006.JPG)

!(https://lh5.googleusercontent.com/_DhvCi5rMe9k/TYNOvW74gMI/AAAAAAAAAGQ/kkfBUaas2v4/s640/humber 002.JPG)

!(https://lh6.googleusercontent.com/_DhvCi5rMe9k/TYNOxB6uuKI/AAAAAAAAAGU/ETrXRIt1BDI/s640/humber 004.JPG)

You can follow detail of the build at my blog