You can bend it back to its shape by using a pair of plyers.
P.s makes me wanna buy a dremel....
A simple Hack saw blade works for me, I mention this so that newbies realize they don't have to go mental buying more stuff. Just check out your rusty garage tool box first.
I haven't seen a canuck vender who sells a real carto punch,or a slap your mamma type thingy, which puzzles me. I'd get one of those before buggering with tapping valves.
I haven't heard of that, but I'm not sure I'd want to use a carto that was cut with a rusty hacksaw.
Jugheads has a very cheap tool, though it requires a screw driver; Jugheads I saw someone else's Siam Mods' version and I'm pretty sold on it, though it's $15 from the US; Stainless Steel Carto Punch v2 and they also have a nice fill tool.
I find the saddle valve technique is only good for a few cartos then the needle valve tends to dull and rather than punching a nice hole in the carto it tends to use brute force which causes the carto to go out of round. Dremel is the most accurate way imo. Best thing is buy a schwack of cartos and dremel 'em all at once. That way you don't have to get the Dremel out every time you need a new carto.
I've ripped to many o-rings using a dremel. Waiting for vape mail to replace the o-ring sucks!
I find the saddle valve technique is only good for a few cartos then the needle valve tends to dull and rather than punching a nice hole in the carto it tends to use brute force which causes the carto to go out of round. Dremel is the most accurate way imo. Best thing is buy a schwack of cartos and dremel 'em all at once. That way you don't have to get the Dremel out every time you need a new carto.
If your juice is thick the saddle value technique will not work well for you. Most of my juice is 20% or less VG. Some saddle values have more of a rounded point then others. A sharper point creates less of a dent. I have never done it but have thought of using a file to sharpen the point.
I do have a dremel but I am reluctant to use it due to concerns about the metal dust. Last thing I need is to suck any metal dust into my lungs. I can see how people with high VG% juice would not have much of a choice. With my higher vg juice I tend to use a ghetto or k tank where I can squeeze it to prime the carto.