*Is it fine to re-ask open questions from ones paper on mathoverflow?*

On the one hand, I am interested in finding an answer to the question, and it might help if it is more publicly available. But if I ask such a question here, I would for completeness sake also mention the paper in which it was asked. But then this gets really close to self-promotion, which is rightly frowned upon.

If an open question is reasonably estimated to require months of research and 20 pages of typed maths to answer, it's not really an MO question" How can you possibly determine that until you have solved the problem? $\endgroup$