“It’s interesting to see the different Mods people are exploring and having fun with. Already seen @claytonisbob’s conduit everywhere LR3 Build 3 Tube Gantry LR3 Build: An Idiots Tale ? Triple conduit gantry, double conduit rails for Y-axis. Even has conduit inside conduit , to explore stiffening his build.”
I like conduit 
But yeah, for the second Y rail I just flipped the roller assemblies in my slicer, worked great.