Depends on your application and your priorities. If you’re riding mountain or fat bikes too, 20 psi is a lot. The only pump I’m aware of with an accurate gauge is the Silca. Expensive as F, but when you consider that the Lezyne already isn’t cheap, and that the Silca will probably be the only pump you need for the rest of your life and will reduce these frustrations, perhaps it is worth it to you. Most accurate tire pressure gauges I’m aware of and more accurate than Silca’s Gauge is Kapius Components but that is $$$$ too, and you will have to pump, then use the gauge to adjust, which is an extra step when you just want to go out and ride. Good luck.