Nice project! I first thought it might be a bit top heavy for being on wheels but seeing the finished piece I think it is probably just fine.

In case you are doing another one there are three tiny details that may be improved IMHO:

* Use smaller dogbones. There is a nice article about this at http://fablab.ruc.dk/more-elegant-cnc-dogbones/ - unless you want them this way for aesthetic reasons.

* Move the cross bar holding on the side walls to the bottom underneath the bottom plate.  There should be enough space in between the casters. (Yes, this way you cannot put the cabinet directly on the ground. At least unless one is willing to put on feet with at least two heights of the material.)

* Use tee nuts to mount the casters. If you mill a shallow recess you can get them flush with the surface of the bottom plate. Actually you can still do that. May be stick a dowel into the holes and the use a Forstner drill the create the recess. Even without the recess the tee nuts may be a better (looking) solution. (I hope I don't embarrass myself and these already are tee nuts. It's difficult to see for sure on the pictures. But they don't look like they are.)

Thanks! This project was ab it hatily built/designed but Your input is really valuable. Haven't really thought much about my obviously big dogbones. but i really liked that solution. definitely taking that in to the design of my next project.
I never really considered getting rid of the feet so the crossbar on the bottom could have worked well. Expcept for a little thing you couldn't have known. In my apartment there is 3 rooms in a row that has a difference in floor height. That means that when i transport this cabinet over the doorstep to these rooms there is a very noticeable height difference. Therefore I tried to have as much clearance as possible for the wheels. I did think of tee nuts actually. and locking nuts. Stupid me had not much time when i bought the locking nuts and accidentaly bought m10 instead of m8. When i found out my stupid mistake the clock was about 01:30 and i just used m8 nuts they had at the makerspace(bitraf) I built it inn. I also thought of recessing the nuts so it would be flush with the top of the bottom plate. There are certainly ways I could do this more elegantly and practical not having the crossbar where it is now, better mounting solutions etc, but i was more in the mindset of just getting it done so I can have order in my apartment. Your feedback is really appreciated and nice to think about when i build my next similar project. Cheers!