It can be done depending how you set it up.

First off your confusing a SFMU with a FMU. 2 different pieces of equipment.

1. SFMU is an FMU and Regulator combined with adjustable rising rate. There is no reason to run both but you can do it if you want to waste money and you dont know how to use the SFMU.

2. 1:1 with FMU is done the same way you would set up any other Regulator with an FMU. In our case the 1:1 with a FMU is pointless becuase the FMU makes having an aftermarket regulator pointless UNLESS your trying to lower your base pressure.