I wanted a simple Bowden Tube connector for my MMU3 unit on the filament side. I perused through Printables and did not find anything that fit my needs. So, I created the following in OpenSCAD and uploaded the OpenSCAD file along with my .stl file. The hole on each side where the Bowden Tube is inserted tapers ever so slightly to provide a pretty decent friction fit. (Please note, the connector shown below is from my prototyping phase where the connector length was 25 mm instead of 30 mm in my final version).
Why would I want this? Well, this allows the ability to gain access to filament without having to disconnect the Bowden Tube from the MMU3 buffer that has been routed to the RepKord RackStand that has been secured with the RackStand crossmember with bowden mount modification (and I remixed the 80 mm version to support heated inserts):
The author marked this model as their own original creation.