gear indicator

I know it's long, but wanted to share an unexpected issue I ran into just this week. Just bought a new 2018 Goldwing Tour w/DCT Friday of Memorial Day weekend (less than 2 months ago) and have about ~1,300 miles (not as many miles as I'd like, but hey, I'm still in the seat). So far I have...

I saw a Gear Indicator on eBay for $25. Has anyone managed to hook this up to a 2001-2005 GL1800. I was thinking of building one using the grounds off the gear indicator switch, but found this on eBay. Honda GL1800Goldwing 2002-2013 sp1 firestorm gear indicator sow 6 speed $25

Has anyone tried to install a Dakota Digital Gear Indicator? How hard was it and how well does it work? http://www.dakotadigital.com/index.cfm/page/ptype=product/product_id=496/category_id=298/home_id=60/mode=prod/prd496.htm