Got my Kato Square clone from Vaportek. Not bad at all for the price, but there are a few issues. On the plus side, the engraving on the front and back is better than I expected. Very deep and well done. The same for the engraving on the fire button.
Most of the body is nicely done – highly polished finish that looks great polished, but this is not the mod to get if you’re bothered by fingerprints unless you want to polish it constantly. Huge fingerprint magnet. The only part of the body with poor machining was the inner portion of the well, which is not polished and has a lot of machining marks. But, that’s covered when there’s an atty or tank installed, so it’s not a problem.
The button action is very smooth with a light, short throw. At least it is now – out of the box it was so crunchy that it wouldn't even fire. Took the switch apart (very easy) and it was filthy. Once cleaned, it works well. Simple switch with a brass screw and a copper spring.
The threading for the switch to get at the battery compartment is so-so. Not great, but not horrible either. Using it with a Sony VTC4 with zero battery rattle.
It fits a Kayfun perfectly (tried it with an EhPro clone of the Kayfun). It also fits an AC9, which is what I’ll be using on it the most. A Tayfun is too big to fit. Photo is with an AC9.
Just for fun, tried it with a Patriot. Fits, but you’d have to use such a long drip tip that using it would be impractical. It works much better with a Cigreen Explorer RDA. The extra height of the Explorer makes for a great fit, and a very compact dripping setup. Photo is with the Explorer and a short drip tip.
It’s heavy – 8.5 ounces with a battery installed and no atty. Comfort in hand is mixed – the edges on the bottom are sharp enough to make it feel uncomfortable unless you grip it just so. Not cut your skin sharp, but annoyingly sharp.
Comes with a small zippered case (it’s what’s propping up the mod in the photos) plus an extra copper spring and an Allan wrench for removing the bottom and top portions. Haven’t done that yet – want to watch Todd’s video on disassembly again before I tackle that.
Certainly not my favorite mod, but a nice addition to the collection.
Most of the body is nicely done – highly polished finish that looks great polished, but this is not the mod to get if you’re bothered by fingerprints unless you want to polish it constantly. Huge fingerprint magnet. The only part of the body with poor machining was the inner portion of the well, which is not polished and has a lot of machining marks. But, that’s covered when there’s an atty or tank installed, so it’s not a problem.
The button action is very smooth with a light, short throw. At least it is now – out of the box it was so crunchy that it wouldn't even fire. Took the switch apart (very easy) and it was filthy. Once cleaned, it works well. Simple switch with a brass screw and a copper spring.
The threading for the switch to get at the battery compartment is so-so. Not great, but not horrible either. Using it with a Sony VTC4 with zero battery rattle.
It fits a Kayfun perfectly (tried it with an EhPro clone of the Kayfun). It also fits an AC9, which is what I’ll be using on it the most. A Tayfun is too big to fit. Photo is with an AC9.

Just for fun, tried it with a Patriot. Fits, but you’d have to use such a long drip tip that using it would be impractical. It works much better with a Cigreen Explorer RDA. The extra height of the Explorer makes for a great fit, and a very compact dripping setup. Photo is with the Explorer and a short drip tip.

It’s heavy – 8.5 ounces with a battery installed and no atty. Comfort in hand is mixed – the edges on the bottom are sharp enough to make it feel uncomfortable unless you grip it just so. Not cut your skin sharp, but annoyingly sharp.
Comes with a small zippered case (it’s what’s propping up the mod in the photos) plus an extra copper spring and an Allan wrench for removing the bottom and top portions. Haven’t done that yet – want to watch Todd’s video on disassembly again before I tackle that.
Certainly not my favorite mod, but a nice addition to the collection.