Thanks Phil. Those look like the specs for the LM-3S G unit thoug. (Ring clearly aren't big on distincitve naming )Specifications
Maximum Power Input Voltage: 24 Volts
Maximum Motor Stall Current: 8 Amps
Maximum Output Current on a Single Output: 1.2 Amps.
Maximum Output Current on all Outputs Combined: 1.2 Amps.
So, assuming the outputs switch to ground, you are good to go.. (more reading on my part to check) - Unless Greg knows the RailPro kit?
I'd wondered where you'd found that as I'd searched everywhere for the non-G version and turned up nothing - It seems they've published the G variant and not its smaller sibling. I'll get some clarity from them before committing