1. The toilet plunger arm thingy....wouldnt be a Dalek without it. I re-engineered a rivet (turned the end around) and epoxied it to a washer that I hammered into a cup shape (placed washer over a large-ish nut and hammered down with the rounded end of a machine screw).
2. The 'other arm' was just a short piece of grooved dowel.
3. Both arms were glued to a cardboard base, made up of more tack strip layers.