I does "move" a tad. It "floats" meaning it has a fixed short Range of Motion dependent upon the Top Pos Pin of the Power Source/Mod/Battery to push it up and engage the Input Pin of its Coil (in the Kanger) due to it having a screw-in separate Coil as opposed to a direct to Pos Pin Coil. As such, it can be quirky dependent upon the design and Range of Motion of the Power Source's Top Pin.
They have to "mate" properly to have an efficient and effective transfer of Power and the design of the Kangers (Tanks etc.) can limit that in happening.
The Kanger Boxes are designed specifically to "mate" to their Tanks etc. as makes sense and one would expect. Other Devices mating to them (either side of the Rig) can be tenuous and troublesome depending on the Designs. That's why some dislike Kanger in general. They are somewhat Proprietary in Nature so can limit the Equip/Devices one uses in conjunction with them. Not a Given but does occur.
To mate a non-Kanger Power Device to the Kanger Tank, a Spring-loaded Top Pin is better and a true "adjustable" Top Pos Pin is the best to insure a proper transfer of Power every time.
I find that to be true with Any & All Tanks/RDAs/RTAs/etc as I have several different Brands, Makes, and Designs of Equipment on both sides so logically I don't put that all on Kanger solely.
To mate a non-Kanger Tank to a Kanger Kbox can be frustrating, not perform properly, and/or (as some have said-I have no 1st hand experience with this yet) damage or ruin the Kbox Top Pin rendering it a "brick". Kanger supposedly is working on or has already corrected this flaw on the newer Versions of the Kbox & Kbox Mini (Sub box). We shall see.
I personally have not mated anything other than the SubTank Mini to my Kbox so can't advise or add to that Intel.
I have a SubBox Mini Kit in route and plan to look at it very closely and carefully before attempting to mate a non-Kanger Tank/RDA to it.
In the end the thing to take from all this and what others have said is;
Do your best to get a Mod/Power Source that has either a true Spring-loaded or an adjustable Top Pos Pin and Tanks/RDAs/RTA/s that have true Adjustable Pins as well.
That will insure the best chances for a proper Mating on all Device Combos regardless of Make & Model or Design which won't render you limited, torqued, and with a bad case of Buyer's Remorse.
This doesn't mean you have wasted or will waste your Cash by any means. You at the worst have only limited your mating choices and options.
It's still all good.
I'm a Fan of the Magmas and still own one. Depending on the Brand of the Clone, it may or may not have an adjustable Pin. I suggest going to a local Vape Shop that carries the Magmas like the one you own (or take yours if they will let you attempt) and the Kbox or Kbox Mini. Insist they confirm the mating and operation of that Combo before buying one.
You will then know for sure.
The Kbox is a fine Device IMO so far and works well (with SubTanks), nice Size and Ergonomics, versatile yet Simple. I like it. For me, it's still a good Deal and I have no issue with it at all even if I can only mate Kanger SubTanks to it.
But then again, I have several other Mods and RDAs/RTAs as well so am not expecting as much from it as you or others possible do or will.
I bought it and another for use outside doing Yard-Work and Farm chores as well as a compact non-Dripper for going to Eat-out, Movies, etc. For those purposes, the Kbox and SubTanks perform and suit just fine with zero complaints. So far,,,,,
