About this 3D model

This is an idea I am working on that I would like to ask for the community help. It is a block that can be printed and made to use as a structure for multiple apllications. The set includes a CobeCube Block, Base, Internal Locking Tube, Base Plug Tube, Connecting Pin and a Connecting Tube Pin. I have tried to print it (as Pictured) but my Printer is a Da Vinci Junior 2 Mix and its about 8 years old now. I would like for people to download, print and give feedback on what works and does not work. What needs changing and what needs adding. Please take note that this is WIP and is not the final release. When I can afford a new 3D Printer I will add more connectors and improve the model. Thanks in advance for any feedback, I appreciate the help. Regards Adrian