I consider the oil pressure gauge one of the better improvements I've made on my Norton. Scared, no. Confident, yes.
I've found a couple of things with the addition of a gauge. One, there is a vast difference in pressure with cold oil vs. hot oil. At startup the pressure is usually at the limit of the pressure relief valve. In my case, that's around 60 psi. When the oil reaches normal operating temperature, the pressure drops to around 10 psi at idle. After you run the bike hard for 20 miles or so, the pressure at idle drops to 2-3 psi. Two, the oil pressure maintains somewhat over 10 psi per 1000 rpm under normal conditions. When the oil pressure drops to zero, regardless of the rpm, STOP! If you don't kill the engine immediately, it will kill itself. With all the plumbing associated with a dry sump engine, I think a gauge or warning light is imperative. The only time I ever lost a Commando engine was when I was running sans gauge. Without a pressure indicator you will discover you've lost oil pressure only after it's too late to save the engine.