Today I tested the hybrid V3 from one of the new developers. Progress has been much quicker with this developer, and ball detection is semi-working already. The actual wheel tracking is all done. It appears he'll be finished well before the others - he estimates around 20 days remaining.
The original developer is still moving along, albeit slowly. I havent yet heard from the other one but am due to have another test build in 2 weeks. Its not going to be long before we have multiple versions to choose from.