I have been trying for days to make this file watertight so that it can be 3D printed, however I have been unsuccessful… The 2 files are meant to be porous designs and are relatively complex. I have already gone through deleting all non manifold vertices/edges etc. Another point to mention is that the 2 stl files are all I’ve got, the software has expired and I am unable to remodel them… Is there anyone who may be able to help determine where the issue lies within the attached files? This is required for testing within my dissertation and is due in less than a month, your help will be greatly appreciated!
I have attached both files in the Dropbox Link below if anyone is interested in helping 
Thanks,
Sasha
