You cannot use the data port to operate a servo or a device that operates like a servo. The R7008SB receiver has room for only 8 servo plug-ins if you do not use the S-Bus. If you need more servo ports, then you'll need something like the R6014HS receiver, which has 14 servo ports, or use the R7008SB receiver and use the S-Bus. Since you're not using S-Bus servos, you'll need an S-Bus decoder for anything that will run off the S-Bus.