I had previously installed a second set of LED indicators like inside the coach. If I recall, the second panel and necessary resisitor packs cost 40-50 bucks, but the LED's drove me nuts with their inaccuracy.
Best improvement I ever did in the motorhome was installing the SeeLevel gauge inside the motorhome with a second external display.
Here's a picture and a closeup of the external gauge.
Joe & Shelly, Justin, Tyler, Alyssa | Butler PA
2008 Tiffin Allegro Bus 43QRP|Cummins 425|Honda CRV