Any pointers to relevant information on HF20 (I assume that's what you refer to by "roughly 18 months ago")? I mean sure, I could try to backtrack through steemitblog and find something, but I have a vague feeling I'll spend an unreasonable time doing that while someone better versed in getting around here will be able to find that in a few clicks. Also I'm interested in not only the dry technical specification, but also discussions like this one.