We've got this old building we are retrofitting, the existing Trane air handler with 2 Carrier CU's is staying. Don't have M#'s not sure it would matter after 20 years of hackery not much is original anymore anyway. I'm looking for thoughts on the best way to control the DX. Each CU has an O6E I believe and is supposed to get 2 electric unloaders to replace the current mechanical units. We have 2 evaps and LLSV per CU. My thought was to stage cooling up and down via the 4 LLSV's and load/ unload the comps to maintain suction pressure. I'm trying to keep this a simple as possible. Thanks