I played a few credits of 1.01 with Ikuo today, for the first time since I got my previous Ikuo score, and got a new PB of 425,628,890.
Unfortunately, my first loop was quite poor in this run, ending with just 212 million due to a couple costly chain breaks. In my previous 420 million run I got 224 million in the first loop. The second loop was much better in this run, though there were a few chain breaks in there as well. Anyway, 440+mil is looking more possible to me with a ~225 mil first loop, so I'll set that as my new goal.