Disclosed is a building block having a body, a stud and a cavity. The LED tracking ring is capable of additive color mixing and in turn can simulate the color of the main projected light projecting from the main output aperture or output lens of the multiparameter light. Since the device cable, passes through this gap, the device cable doesn’t perturb the consumer electronic device. Further included is a cap which covers the membranes, said cap exposing the active membrane to an outside fluid pressure. This information provides a direct indication of which steps result in the production of particle contaminants so that those steps may be targeted for modification in the development of particle recipes. The pad fits snugly against the body without penetrating.