You’re probably right… I wasn’t thinking about the catch cup… just head to head coverage between 1-3 & 3-4.
Still, even just having one at #4, you went from 15ml to 20ml… that’s a 33% improvement. If you’re using standard 10 minute catch cup cycles then you’re realistically talking about adding another 20-40 ml in that area during normal watering by using an MP2000.