Hard to tell really. When we see the aircraft, we see the externals, not the internals. So its a bit hard to know the appearance of individual LRUs. I've seen a lot of things being made for HAL, but I could not identify them. I am pretty sure some of them weren't for fighters but for helos, so there is that.
But I can tell you that the air-brakes of the Tejas are manufactured there. I've seen it being worked on by a 12 axis CNC machine. The machine was probably a MX-12. Other than that I've seen brake pads, jet starter, gear sets, some random metal braided hoses etc.
I've lost count too. @randomradio knows.
If SP-16 is the final aircraft of the IOC configuration, then whatever follows after that should be the first of the FOC configuration. It seems they are building multiple aircrafts at the same time. If that's true the initial lead time would remain the same but the follow up time would greatly improve. The first FOC should fly off the production line in a few months. But this is just my take, don't take it seriously.
