Not most of them. The smooth rods you're specifying are too thin, and lack support, which is essential if you want a machine that won't vibrate too much. The hardware-store threaded rods lack precision, and will tend to hang up due to their irregularity. 2x4s will work to build a table to mount a router, but they move around too much to use for critical parts. The motors want 50vDC but the drivers max out at 42vDC - it should still work, but you won't get the full performance the motor can deliver.