My idea is precalculate this part: **7ae41e4649b934c****991b7852b855 and just brute force the second.
I think PrivatePerson is referring to that topic:
https://bitcointalk.org/index.php?topic=5385235.0For sure any gap is a complication and I think brute-forcing the key from puzzle requires a dedicated program, relying on existing solutions requires too many additional assumptions.