potentiostat/galvanostat electrochemistry 50 ml beaker lid

in our lab, I needed a lid to grab all my electrodes (Counter Electrode (CE), Working Electrode (WE), Reference Electrode (RE), Thermometer and etc.) safely and in all of my experiences the distance between electrodes be equal. And because of the small amount of the solution, the test had to be done on a small human. so, I design this lid and variable diameter plug to Standardize the diameter of the electrodes. unfortunately, I don't have any photo of it bcz it is in our la and I am in vacation. I will post it after I get back