A tamper protected printed circuit board assembly including a printed circuit board and a partially enveloping tamper wrap covering the entirety of the top surface of the printed circuit board and a first portion of the bottom surface of the printed circuit board, wherein a second portion of the bottom surface of the printed circuit board is not covered by the tamper wrap is provided. The electrical switches may be connected accordingly in parallel or in series to terminals of an overhead door operator. The pair of spaced legs and base define a space for receiving the first end of one of the arms of the booster axle assembly. The stamper includes a stepped portion formed as bends in the material of the stamper. The base at the lateral wall thereof has a guide groove and receiver grooves with a resilient piece being received in each receiver groove. In various embodiments, the methods comprise providing a polymeric solution comprising a polymeric material; collapsing at least a portion of the polymeric material about one or more precursor moieties; cross-linking the polymeric material; modifying at least a portion of said precursor moieties to form one or more nanoparticles and thereby forming a composite nanoparticle.