Look at this tutorial on pages 19,20,21 (logging data and remarks...point "d").
That was written by a member here based on the s4wik Tuning page and discussions here a while ago.
I do not think the author really understood IOP at the time, since tuning it properly wasn't discussed that in depth at the time he wrote it.
While we were all grateful that somebody went through the trouble of writing a tutorial, I expressed concern that his PDF was not editable, and that it, like proprietary software that becomes abandonware, would suffer obsolescence if the paper was not properly curated.
Unfortunately, the author did not understand my concern, or share my ideology regarding publishing information.
It seems my concerns were well founded.