Here are some of the Doctor Who scratchbuilds I have made. The Cybergun from 'The Five Doctors, The Troopers' rifle from 'Earthshock' and theTesh gun from 'The Face of Evil'.
Thanks. Yes, I made the Polyphase Avatron in my picture. I was allowed access to the original prop to get the measurements. He has radio controlled movement of his head and, unlike the original, his eyes light up.