Yes, please be careful! The last thing the community needs is another e-cig blowing up story! Nor, do we want anyone to get hurt!
I have never vaped over 5v with my passthrough. I mostly use regular ego's at 3.7 with a 2.0 boge carto. That gives me a satisfying vape! I will use my twist to turn it up a bit of the carto is getting a little old. If I am using my higher rated clearo, I will also turn it up a bit or use the 5v pt. I even turn down the twist when I use my lr 306 cheapo atty to drip.... Fun, fun fun!
Stay safe!