So what are these things and what are most people doing to replicate these? Making them a solid part or actually pieces and hollow as they are on the car? Starting out I think I am just going to make some simple solid models for the hockey pucks. Can you give some dimensions of these parts? Mainly just the thickness and diameter and angle of the cut out? Also, these aren't just mounted to 1/8" aluminum like the caps are. What is the base made of and dimension of it as well?