I've searched and searched for examples of lumber storage and quite a few here on SMC have constructed their own using 2x4 construction lumber and iron tubing.

All of them have mounted the iron tubing in the 2x4's using holes drilled at a slight angle (3-10 degrees).

Now to my question:
I'm contemplating building my own version, but I'm still wondering just how I should drill the holes accurately.
My problem is that I don't (yet) own a drill press, so I'll probably be using my DeWalt cordless for this job as I feel it's too tough for my beloved Festool C12.

Will a simple guide made up of a scrap block cut with the desired angle on one side do the trick?

Suggestions on how to do this are most welcome! :-)

Thanks,
Niels J. Larsen