Thanks for the additional info. I hadn’t looked into it before. Libbitcoin started in 2011 so we were well past the point that it had been retroactively applied to all blocks, so I wasn’t aware of the prior variations. As I mentioned, I have tasks to implement various lost forks (all of our forks are conditionally applied via config). Though digging through the code to isolate them can be a challenge. Just setting the limit at v0.2.0 is a lot.