The timing of this post was perfect for me. I watched the video yesterday, and did an iron fitting with my instructor today. Thanks for the content!
Points 1-3 were pretty well established through conversations with my instructor during lessons leading up to the fitting, as well as email exchanges. I thought I had narrowed down my choices pretty well, but when I arrived and saw all the heads I requested lined up, I realized there was no way I would have time to sufficiently test all of them. We had another good talk and narrowed it down to four (down from maybe ten).
Point 4, I was c