I too have an early PWT (purchased in 2011), that feeds a PWD Mk1. The drawer has been getting a bit loose and shaky. I've thought about other transports, but I like the I2S connection between the two units. The price for a new PSA transport is crazy (even with potential trade-in). BTW, the "upgrade" of the DAC to pure DSD mode, starting with Mk2, remains controversial, IMHO. I can't claim to have heard the two side-by-side, but I know some seasoned audiophiles who were never enthusiastic about the result...