Trying to design a part, have a few questions.

[anthony24x]

I just bought my first 3d printer, a Prusa i3 Mk3 and i'm waiting for it to come in the mail.
I have a plan to put it on a tv stand with the filament sitting below in a sealed container with a moisture absorber.
I plan to run a PTFE tube from the container up and around the back to the top of the i3.

I'm trying to design it in Tinkercad, this is my first attempt.
Looking at it I see a couple problems, the guides I created to set the ptfe tube into don't appear to be connected to the guide. I was about to redesign it but I was looking at it and i'm not even sure how it will print, I mean wont the outlying structure cause the entire print to droop? Should I make it two pieces and change the supports so the two pieces slip into each other? Any advice is welcome!

Filament.jpg