like other users here I came from a 3018 and similar units, all of which have I have pushed to their absolute limit (aka destroyed). this machine is quite simply in another class altogether. I wanted a better grbl machine that I could swap in for my 3018 and this machine literally plugged right in worked the first time after setting up in easel. fairly easy to put together, aside from some quirks and issues with the instructions, which is entirely part of the game with these machines. here are the idiosyncrasies I came across. - the manual tells you to “install” the couplings on the lead screws before you install the motors and motor mount. this can misleading because what you want to do is only slide the coupler on to the lead screw, then install the motor assembly, position the coupler, then lock down the coupler with its set screws/collar. don’t “install” the coupler straight away on the screw or it probably won’t be in the right position once you actually install the stepper motor. - my frame needed adjustment to be square and sit flat. find a perfectly flat surface, loosen all the frame bolts and settle the frame down to the surface, square it and the retighten everything. the manual mentions some of this. - even after adjusting the frame I still had one small bolt/hole alignment issue where the cable track attaches to the frame. I had to use a clamp to pull it into alignment. - some of the limit switch cables came stuffed way up inside the cable track, requiring me to fish them out with various tools. in the process I stupidly broke one of the limit switch wire connectors and had to put it back on, which wasn’t fun at the very end of the build. totally my fault but just be aware that the cable ends may be hidden way up in the track, and should be pulled through with care. overall could not be happier with this machine!

I'm really excited to use the 4030 and it just look amazing, but mine unfortunately came with a few missing parts. Fortunately, Sainsmart has great customer support and is sending me the appropriate parts, but I would have really liked to have had this ready out of the box. Regardless, it's a great entry level machine with great capabilities and I'm sure as these get manufactured more that they will get more efficient!

The package arrived very quickly, I must see that everything is fine, in a few days I will be assembling the machine and I will update this review, I will give more details and photos. Thank you.

Assembly is very easy. The machine has a good look and is a great size.

This is my first CNC, background in 3D printing, but what a learning curve! Setup was easy. Very well packaged, took me about an hour to setup. Very well written instructions, well documented. Looking forward to upgrading already!

I just received my PROVerXL 4030 this week. It is very well constructed with robust components that were easy to assemble. It fired right up and I was carving in no time. I was using a 3018 before, and there is simply no comparison in the performance of this machine. I can’t wait to see the upgrades and accessories when they are available. I think this machine is very fairly priced for the quality of the components and the overall performance!