UPDATE. On January 15, the gas generator's pressure gauge broke off, rendering it unusable. I had to go to North Carolina for a long time, so I only got back there now, in April. The design flaw is that the sensor's dial is mounted on a 2-inch plastic rod that goes into the grip. Even though it looks like it's a solid body, it's not. There is a 1/16 inch gap between this fragile shaft and the main body of the grip. I managed to lean on it or something and the dial fell out! So I couldn't return