I do not this time Paul, but it is very simple and almost self expanitory. You have two halves that are 1/2 thick or 3/8 thick is fine and 3/4 or 1" wide, it just isn't that important. Me I take a 3/4 thick board and rip it into a 1/2 strip then make a couple passes through the drum sander while it still has some length..and that just helps with a nice glue seam. I draw a line down the center of the strip, so if it's a 3/4 wide strip, the center is 3/8. Lets say you have a gent because I rememeber those off the top of my head and they are 1/2" wide tubes. So from the center line you measure back a 1/4" from either side, thus you have the width of your tube centered in the half blank. I draw the same thing on paper, two parrallel lines the width of the tube. Draw your picture on paper, then cut it and glue it on the blank with some thin CA is fine. Later, the paper will just turn off anyhow. I also like to mark the length of the tube so when I attach the picture I can position it in the center or above or below center. Drill hole in picture and cut it out. Do same thing for back side, or just leave back plain, whatever you want, same with lower barrel. This pen has a divider, doesn't have to. Fill with inlace or epoxy or PR, drill and turn. When I glue two halves, I just use wood glue dabbed across not too much with my finger, so the glue doesn't fill the holes you cut. I trim ends flush when dry. You can just take a picture of the side of a dog, then shrink it down to be 1/2" wide or for mine it's 3/8" wide..I do that right on the computer screen. Put paper on screen and trace the outline of the dog, real simple, doesn't hurt my flat screen monitor at all, not that I'm pushing that hard on the pencil anyhow.
You can scroll right through a 3/4 blank..for most pictures, it won't look good. That only works good for symetrical objects, like an arrow. With a dog you'd end up with a dog on both sides facing each other, which isn't that appealing, and if the blank isn't perfectly centered when drilled it will be way obvious, but if picture on back is different or no picture at all, then there is nothing that can be an obvious mistake.