Repowered a Weaver Alco RS3 3 railer to a deadrail, 2 railer using one powered NWSL Stanton drive and LocoFi. Locomotive operated better than expected. Pulled a 9 car consist with no wheel slip plus took videos which are on You Tube. Only major problem was that when operating locomotive on club layout using only phone to communicate with locomotive it went out of range. Added router and locomotive operates perfectly. Envy of other conventional 2 railers because, club does not have DCC, I have the only locomotive that has all the "bells and whistles" operating like a prototype without the need for conventional track power.
Now working on second phase of repower. Adding second NWSL Stanton drive and dual power source to use either battery or track power. Will control with ON-OFF-ON switch plus change speaker to 4 ohm 3 watt to have higher volume.
A friend and I tried installing LocoFi to 3 railers and it did not work. DC motor(s) drew more power than HO LocoFi board could deliver. We were able to get the motor to move by nugging with your finger to overcome high starting power draw. Have advised LocoFi of our findings and gave recommendations for a true O gauge system.
Will update this post when my second phase is complete and operational. LocoFi is going to be the best thing for us old guys who want to have "smart" locomotives without having to rewiring there layout.