I'm working on my fist pipe kit that my wonderful SWMBO picked up for me this past xmas. I've been at it for a couple months with a Nicholson 4-in-1 file/rasp that I got for about 9 dollars. I'm aiming to get a sanding disc in the future, but for now it's all sanding by hand. Anyway, on to the questions and pictures!
First, I've been aiming to make the width of the chamber wall to be around 1/4". The portion from about 12 o'clock to 3 in the 2nd picture is about a 16th too wide. Should I go at it with the rasp again, or would it be better to play it safe and work it down with sandpaper?
Next, looking at my stem, I'm not sure how to best work that shape into the stummel. If anyone could point me to some examples of things that have been done with this shape and stem, I would really appreciate that. (I can post this in the 'stems' section if it would be better suited for there)
Starting:

As it is now:
