DIY sewer pipe dibble wheel making help sheet, files, and parts.

I do like what you've posted and the links you've offered. I like the general design of the sewer-pipe drum dibbler, and the list of materials and the discussion.

There are quite a few hints. However, to actually build the drum dibbler from what's now given, I'd be doing a lot of guess work and trial-and-error. Of course I could do this, but I believe your intent is to make the process of DIY construction an easy one.