I take too many readings to use paper, I also make a graph of said readings, I’m not about to do that with paper. I keep my meters in a dual knife belt made for two knives, I think it’s a drywallers hip belt. Also keep a flip pad on me and a temp gun a pair of sharp scissors and a lighter. Anyone that works for me has the same. I never hire anyone that can’t tell there is something up with the readings, ya know sometimes how you know damn well there isn’t enough ppms to buffer your readings? So stop adding whatever balancer you’re using, calibrate, then try it again. 9/10 it’s going to read different.