Thanks for the update Jon
I tested Arasan some time ago, because it has a strength setting. However, it seems that it doesn't simulate 'thinking' by wasting it's time; in other words, if set to a lower strength, the engine moves immediately. Is this correct?
If you could change this, Arasan would probably become one of my favorite engines to play against besides Stockfish 10 and Texel 1.07.
Honestly, I'll have to download and test some more open source engines that have a strength / skill / uci_elo setting and see how they work.