3D Printed Fuel Pump Retainer Ring Tool 360/430/575/599/612

Turning the fuel pump retainer ring can be difficult without a proper tool. Some people have fabricated their own tool and universal tools are available for relatively cheaply. I designed and 3D printed this one in ABS. It should work on multiple models, using retainer ring part number Ferrari/Maserati part number 181682. This includes Ferrari 360, 430, 575, 599, 612 and Maserati 4200 Coupe/Spyder, Quattroporte/QP5, Granturismo/Grancabrio.
The 3D file is attached. Change the .TXT extension to .STEP to use. I recommend printing with several layers (my printer defaults to 2 outer layers, I prefer something in the 5-9 layer range). This is not a perfect solution, but can help someone who's got a 3D printer.

One of the inside slots is wider so it only fits one way on the ring. The square holes for the ratchet are the weak link. Therefore, use two ratchets, both preferably 1/2", on opposite sides. I know torquing the retainer nut is a bit difficult since it does not have a central turning point, but mine has been ok with hand snugging with two ratchets.

I could print and sell these, but I think there are decent, low cost solutions available commercially without the shipping hassles. I can give these out, if you need one and can come pickup in the Houston/Katy, Texas area.
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I agree these 3D models are a bit uncharted territory and there are multiple issues. This tool is pretty clear to categorize though. I took measurements of the retainer ring with calipers, designed a part to fit it, and printed it - It's not a copy of anything or anyone else's work. The IP is mine, and I have provided it here for anyone to use for free. Someone could take my work and sell these too, although I don't see it being big business as there are other low cost, commercially available solutions that work well. I have also offered these for free, although you must come pick it up from me, so it's not a solution for most.

A single place to get 3D printable parts is a nice idea, but if it is just a single thread where everyone can write comments, it quickly turns into a huge mess with many posts that are not really of any value to the people coming to get files in the future. A locked thread where only the admins can post, but anyone can like, might work better. But that's work for the admins. Making it editable for a few select contributors might work better.
Another problem is revisions. This is now on revision 9, although somewhat amazingly the first revision worked, and I have made only many small tweaks to this tool. Let's say someone suggest adding holes to this so that a metal turning plate can be bolted to it, or it fits a bit too tight and we want to loosen some dimensions, or I messed up and uploaded a completely wrong file. Some of these changes could be made by whoever is printing them, obviously depending on their capabilities. In any case, I agree to make the changes. Where do I change the file so new users get the latest one, and how do we delete the old version that didn't work, or didn't work well? Again, maybe a locked thread could be edited by the admins or maybe a few contributors.

Using an external 3D printing site, such as printables.com as suggested by @EastMemphis works, but I do not have plans for that (feel free to call me lazy).
The easy solution is to make single posts for each part and hope people can find them - This is how things are now. It works, but is not ideal.

General statement related to 3D printing, I would say that if you have a printer, you really should have the ability to model parts and not just rely on finding models online. It really opens up the capabilities for what you can do with the printer. You end up finding lots of real, actual uses for it, not just making decorations and other junk.