I know this thread is pretty ancient at this point but I was just printing a huge flood on an 18 x 24 print last week with my semi auto and the first couple of sheets stuck so badly that I had to physically pull them off the bottom of the screen. I stopped the press, misted the screen, pulled the ink, added some extender base to to thin out the ink some, adjusted the peel to increase it, and after a few test prints I was golden for the rest of the run.
PS - that safety belt shit is amazing and is definitely going to get stashed in my little brain for potential future use. Screen printing ingenuity never ceases to amaze me. Fucking brilliant.