I have DD RTX gauges in my car. I can't comment on the install too much since I didn't do it, but my mechanic said he loves working with them. They look great and function perfectly. Very bright, easy to see.that's really the main reason I got them. They have a lot of functionality that I don't really use. I love them.
https://youtu.be/aZsiJm1HETI?si=aivftaj0wy-w1xTF
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70 TA, 467 cid IAII, Edelbrock D-port heads, 9.94:1, Butler HR 236/242 @ .050, 520/540 lift, 112 LSA, Q-jet, TKX (2.87 1st/.81 OD), 3.31 rear
https://youtube.com/shorts/gG15nb4FWeo?feature=share