Nice tutorial, DC!
Glad to see I'm not the only user of the mighty two popsicle stick and blue painter's tape anodising rig
Two things I would add, from my own anodising experience:
You get a lot less splotchy areas and better all round dye uptake if you suspend your anodised pieces in the dye bath in a way that they do not make any contact with the your dye container or anything else. I usually use a set of helping hands to hold my anodised pieces by the leads, at the optimal depth in the dye bath, so that nothing is touching the dye container. Alternately, place the piece in the dye bath on a surface that isn't going to be visible in the finished piece. Most of the time, the splotchier areas on my anodised pieces tend to be the areas that made direct contact with the pot I've got the dye in, or with other pieces that I was dyeing in the same bath.
Two, never use steel wool while cleaning the pieces in preparation for anodising. It gives a nice finish, but filaments of the steel wool, (especially the OOOO, ultra-fine finishing grade stuff) can get caught in small scratches on the surface of the aluminium, get into the anodising bath, and contaminate it. I've got a few test pieces that are black, but with orange splotches where steel wool got in, rusted in the bath, and that was absorbed by the anodised surface. Use ultra fine scotch brite pads instead.