Cluster regulator varying output

Google it. You can find endless projects. One caveat of "DIY" is that some of these don't have much protection in the case of failure.

https://www.google.com/search?num=2...0....0...1c.1.64.hp..20.16.1652.0.aWY_cgEJMMM

https://www.google.com/search?q=diy...ChMIsLmGrfGXyAIVjJuICh3nMg-t&biw=1138&bih=511

I'm fully capable of doing this, but decided to buy an RTE, because they were highly recommended. If you blow up one of your guages (or both) "what will" it cost to rebuild or replace them?