This blog post will cover the outcome of my pour. Out of three trees, I had one fully successful, another that was very close, and other that had a bigger air gap. something that should be solved by the addition for more air risers.
I also found bits of the outside shell inside the cast, this was due to the lid of the tree getting stuck due to my poor effort of filling the top off. Hopefully, the next pour will come out much better, as i have learnt a lot about the process.