Thanks for giving me some details into this. I always test my builds with an ohms reader before firing and then I fire for hot legs adjust as needed and test one last time before actually using it on my istick. If maintenance and risk is less if I have no plans to sub ohm then I may consider. I did look at the kick and see it is a circuit board. Does it need to be installed via soldering? or does it sit at the bottom of the mod and then batteries are piled on top of that? The only reason why I want one with with a display is because I like to check to see how much battery power I have left. I usually leave my VV at 4.7 volts and I don't run any lower than 1ohm, usually 1.5 is my happy spot. but money is tight and if I could afford a digital display VV tube mod with replaceable batteries I would, but mechs seem much less expensive.
The kick just sits on top of the battery. No soldering.
I use 2 vamo's and a few mechs. Sometimes one of my vamos has a habit of cutting off - maybe from a little battery rattle or something; then I have to click 5 times to turn it on, then I have to wait 5 loooong seconds for the "System ON" message to scroll across the screen. But with my mech with a kick there's no waiting; press the fire button and that activates the kick.
A mech is a good thing to have for a backup; I'd get a mech like an astro telescopic. It will take a kick and an 18650 battery; some mechs are not long enough to take both; and a telescopic mech means you can be sure not to get battery rattle.
One common point of problems is the 510 connection:
1: depressed center pin problems where the electrical contact fails
2: topper not screwing all the way in snugly so it seems wobbly.
The typical mech mod features adjustable centerpin, fixing both of those problems.