I have tried a couple of variations of that technique, Trevor, and thus far, haven't had much better results with it. In some molds with troublesome undercut areas, I find if I fill the mold 1/3 of the way up while runny and squeeze it so that the resin coats the inside and then fill the rest of the way that it will help.
Love the pics of the resin parts, Doc. Show us more, please.