You will not be able to stack anymore slimes on top but might be a good top to your slime collection. It can be stacked on top of the others.
I saw that the files needed repairs so I did it and uploaded the repaired files. When I use slicer it still shows that they need repairs. I sliced them and checked every line and I see no issues. Also tested to see if it needed supports which I personally see no need for.
The crown is from http://www.thingiverse.com/thing:641310
My first version that I printed the crown was very thin. I just updated it and will test it out later today. I also found that when you are printing this at the time the crown starts it works best if you manually slow down the printer speed. I dropped it to about 70% of normal speed.