You can disable auto-focus in the ProCam apps. To be honest I do not recall if I has disabled it or not but the option is there.
Thanks matthewepler for the kinds word! I have so many interests and hobbies, I try as much as I can to make do with what I have when possible, otherwise I would be constantly buying gears and things. I felt like the result was acceptable enough after my first few tests to go on using this homemade method. It’s no replacement for a real image by image transfer, but it is also much better than a transfer box or nothing at all.