Assembly is identical to the Streamlined Slim. The only difference is that if you want to use the black rubber grip, you will need to cut off approximately 1" portion of the acrylic/wood from the lower barrel so that the rubber grip can slide up onto the brass tube. Cut off just a little less than the length of the rubber grip. I like to have the exposed brass tube be about 31/32". Just a little shorter than the rubber grips' 1" length. This will result in a nice tight fit.
The pen kit can be made with or without the rubber grip, but every kit comes with a rubber grip. See other kit photos for a sample of a finished pen with the rubber grip.
Shown finished with a Bear Tooth Woods Emerald Water acrylic blank (sold separately). The tube was painted with a gloss white and the inside of the blank was painted with a light green acrylic.