Thanks for yet another incredible tutorial, Jason!! I also had to read this several times to absorb everything. I now see how unusual and difficult this class of doubling is to describe. You have also done a great job illustrating several doubled dies that have not even been on my radar. I just can't thank you enough for the foundational work you do for all of us in the hobby! Not only is it good for future reference, it keeps me motivated to keep searching for the new stuff!! Amazing work all around!!