Hey Kim, know what I like about you?
I like your ingenuity. The point jig that you made and now the sanding mandrel. It shows that when someone is in need of a special tool or jig, you think outside the box and experiment with what you have at hand. The best part is, you're contributing to an essential forum and helping others.
There are many of us that are doing this for a hobby and actually don't have tons to spend on expensive tools. Would I like to have that kind of money, fer sure, but I don't. I blew a large wad on setting up my small shop and didn't spare any expense on anything. Now, I like helpful posts that can help me get by a little more economically.
Myself, I love doing repair work and will delve into cue making a bit this winter. For the amount of cues I will build in my life time, I'm pretty sure that one of your mandrels will work great for the time being.
Brianna used to sell SS mandrels.
Necessity is the mother of invention. Keep up the good work.