I have been using WD2D+ with roll film of all makes and speeds for a year now and have not run into any streaking or other abnormalities associated with staining developers. After reading your methods, the only suggestion I would make is buy a bottle of distilled water to mix the developer with. Although your local tap water may be "clean," as I understand it the ph of the water can have not so pleasant effects on the action of the developer, and from everything I've read this can be especially true for staining developers. Plus I always follow the 15secs of agitation every 30 seconds in the instructions - seems like this developer cannot get too much agitation.