I am a big fan of what I call "factory plus" where most of what I do is subtle and not overkill to my gx470. I use my GX470 to tow my lotus elise (~4000lb total with trailer), and wanted/needed to add a trailer brake controller. I loath the bulky traditional controllers that hang down and destroy your shin while driving, and through a little research settled on Redarc.
I bought the liberty controller (~$135), the GX harness (TPH-021 ~$20), and the plug blank (TPSI-007 ~$9). Their harnesses are very high quality, and no additional cost vs splicing your own, and the plug blank fit great! I highly recommend it if anyone is looking. Install was easy, and I just moved the inverter button to right inside the fuse cover if I need it.
I bought the liberty controller (~$135), the GX harness (TPH-021 ~$20), and the plug blank (TPSI-007 ~$9). Their harnesses are very high quality, and no additional cost vs splicing your own, and the plug blank fit great! I highly recommend it if anyone is looking. Install was easy, and I just moved the inverter button to right inside the fuse cover if I need it.