Mould making tutorial, Part 7 - corrections

Like I wrote here in Part 5, I planned to use the opening at the end of the mould for pouring the silicone in:

But I made a test and it looks like it's very hard to get the silicone to flow through the pretty narrow space to the other end of the mould. So I made some modifications to the plaster shell. I drilled and sanded some additional holes, including the big one to the middle. Really, I should've done it right away...