Wow Dude - that's a BIG Arse Print!!!
Glad to see you Rockin' out the Print Volume on your Centauri!
I'm curious - what material is it?
As for getting sucked up against the wall - if you do like Screw Threads type cutouts of the sides of the unit - it would allow water to be fed down the sides of the unit and hopefully stop it from getting sucked against the side walls! Check out the design I quickly Mocked up for you - to show you what I mean - file is attached.
Yeah - obviously - I LOVE to do 3D Modeling - and I like taking on Design Challenges!!!
-K