So ive been experimenting with this for some while now and with these files i also release the negative cutout that i use to get this. With this 

you can create any bust more or less into a controller stand

step 1, chose your file

Step2, scale it

Step3. Click object you want the cutout in, right click add negative part and load the cutout.stl

step4, place, rotate etc

step 5, add aditonal cube as negative part and scale and move this into place aswell

Step 6, paint and ready model with your favorite settings 

step 7, slice and hit print!

Made of the model Deadpool Bust (Remastered Supportless Edition) (STL) by Eastman | Download free STL model | Printables.com