This isn't a new engraver. It's a new heart for the one you already have. In spring 2025 I swapped the LaserTree LT-4LDS-V2, a 20 W output diode module, onto my old Mecpow frame, and the difference scared me a little.
Real watts, not marketing watts
When LaserTree says 20 W, they mean 20 W of optical output, not the input power that many brands quote while the real output is 14, 15 or 16 W. A test in another review I saw measured around 22.3 W. LaserTree mainly makes laser modules designed to fit the engraver you already have. I used the same settings I'd saved in LightBurn for my "22 W" Mecpow and nearly set things on fire in 10 or 15 tests. On leather I had to cut the power and the number of passes nearly in half, and it still went a millimetre or two deep. It made me doubt the ratings on every other laser I've tested.
Installation and support
The box had everything: cables, screws and an air-assist tube. The tube was a bit thinner than mine but connected to my Mecpow's pump. The swap itself took about 5 minutes. The module has its own power supply and board, so there's some extra cabling. That took me about 10 minutes and was quite entertaining. I had a doubt during assembly, so I emailed them. They replied in about 10 minutes with a WhatsApp number and we sorted it out in a chat. The manual is in proper English, too.
It's built like a tank, with a metal air-assist nozzle, fan cooling, a pre-mounted air hose and a safety window. It's enclosed on four sides, which limits visibility but adds safety if, like me, you don't have a full enclosure. To focus, you slide a small knob down to touch the surface and lock it with the bolts on the sides.
What it can do
The surprise was rust removal. With many small, high-power passes, it cleaned the rust off an old tool and brought it back to bare metal. It takes time, but it works. A Bambu Lab logo on a metal board came out at low power and high speed. My usual keyring in 5 mm wood with a black surface cut like butter in what I think was one pass, with smooth edges and no burn marks thanks to the air assist. Photo engraving was great too, as always tested with my Scarecrow from The Wizard of Oz.