This document summarizes four work placement projects completed by Dominic Povey from September 2006 to July 2007. The projects involved designing add-ons and modifications to existing Southco latches for various applications. Specifically, the projects were: 1) an add-on spring bracket for overhead air conditioning units on trains, 2) a push button version of the R4 latch for storage units in automotive and transportation industries, 3) a modified latch with clearance for gloves for construction equipment storage units, and 4) a system to securely latch down truck beds for storage units below.