Hi Blake,
maybe you could use some first hand information about the RatRig. I have the V-Core 3.1 300 mm and all things considered, I am very happy with the machine. I bought it about nine month ago and have done not excessive, but quite a bit of printing since (maybe around 6ā¦10 kg of plastic through the nozzle). So far I had to do zero maintenance. No loose or damaged belts, no defective bearings, no problems with the rails. It is build like a tank and simply works.
I bought the configurable kit from the official site, because I liked the idea of customizing it by myselft to my needs, but still getting everything from the same source without gathering the BOM from a dozend different online shops. I bought it with the printed parts bundle, which was very well spend 45 ā¬. The quality was good and you may have some trouble to even buy the raw filament for this price, let alone the time it would take to print them all. Assembling the kit was a pleasure in its own, as all parts fit very well and the instructions are well made (reminded me about my Lego days when I was a child).
I preferred it to the Voron because I liked the accessibility of the electronics. In the Voron they are mounted in the bottom compartment and as far as I know, when you have or want to do some work on it, you have to flip the printer upside down. On the V-Core everything is mounted in the back, so you simply have to turn the printer around, what was a huge advantage for me. Besides that I like the mounting of the print bed more. In the Voron you have four motors aligning the gantry to the bed, in the V-Core only three. Since a plane is fully defined by three points, a fourth point can only mean trouble in my opinion.
When it comes to ABL you have quite some options, since the EVA print head is designed very modular. I used a BLTouch with no problems at all (at least not with the sensor itself) and switched over to a Super Pinda Probe recently. All I had to do was to print out a new holder for the new sensor. So if you donāt like the BLTouch, you can use any other inductive or capacitive probe which is 8 or 12 mm in diameter.
Of course I cannot know if other printers are even better than the V-Core, because I have no other coreXY printer (yet), but it definitely has a lot to offer. Actually, I am in a similar position to you at the moment, because I want to build a second coreXY printer and am thinking back and forth which one it should be. I would like to design one by myself, because I allready designed and build an i3 style printer which works very well and would like to have a new challenge. The āproblemā is, that the result would probably look an awfull lot like the V-Core in the end, because I cannot think of a lot of things to improve on it. Therefore I am seriously considering to just buy a second V-Core kit, this time the 200 mm model.
So, I hope my long-winded text held some usefull information for you. If you have further questions on any details, just ask.