I have been trying to install both, Pure and Win 10 together but on two separate HDDs on a HP Z-400 workstation station with 2 new HDDs. I did spend a lot of time searching but everyone is plagiarizing the other guy that assumes everyone has ONE HDD. AskUbuntu has more ‘this was already answered’ than they have help. I guess they think a answer for 5 years ago is good for today. So I black listed them from my ever landing there again, even.
So I’m going to ask here - my last resort (because I talk too much here 
) it will be my next post.
I have a feeling you are successful with your re-sizing partitions and making it work. Once I have to two working together. Next Wednesday.I am going back to that ltop and try your suggestions which I copied out and printed in case I blow up my modem/computers/house/city/planet.