Hey I'm just an inventor here not an engineer. I use an antiquated evaluation version of Eagle, V7.7 on my local linux box. I downloaded and installed Elecrow's DRC and CAM files to my Eagle install and everything works like a charm. My PCB prototype has now gone through over 20 evolutions over the last 5 years and not once has there ever been a mistake from this company on any board I've ever got them to build. What is also nice is that if they have any extras they include them free of charge. For example If I order the min 5 they usually send more. I live in the middle of Canada and can always depend on about a 3 week turn around from the time I upload the gerbers until the prototype PCBs are in my mailbox. This is one heck of a great service here. Thank you to all the Elecrow staff that pay so close attention to every single detail to make what I'm trying to do so much easier!