Dammed i was editing the other post and it froze!
Ok Jay, i managed to make it work! Problem is that your assy. is way to big and that there's a glitch in the material list!

When i tried to bring it in the assy. editor, every thing froze! So what i did was to replace every sheet stock from your assy, with the material i have in stock! Result:

From there, i was able to transfer in the editor (looks like you use a lot of different material of the same species for nothing). As per what i see, your assy. is way to big (15 different major components in on big assy!) What i would suggest is to make multiple assy. with it and then your machine would be able to work normally with out freezing, and would make your work easier to modified parts in it with out having to bring the whole thing at once! Result from the editor:

As you can see, it worked OK and i managed to bring the offset cabinet into the unit! But still, it's extremely big! I have a very powerful CPU and even then it took some time to work around it.
I returned to the custom layout saving the change and readjusted the hight of the assy. to floor level, result:
Sorry if i played around your file but it was the only way i could make it work!
In resume, you should save it in multiple assemblage for an easier access to your build and try to keep your material list as precise as possible.
I will try to split your drawing in a easier way to work with and post it back later!
Hope it's all right with you?
Francis