You've been given a progress report, apparently twice now. What you seem to want is also a fixed estimated schedule. As everyone involved has already explained, and as you know from your own work, arriving at meaningful estimates requires analysis, which is itself a scope of work. And given the nested scope as described for you, this is not quite as trivial as merely typing three arbitrary lines if those lines are to be at all useful.
As Steven McConnell reminds us, accuracy is quite different from specificity. A specific answer which is inaccurate is not useful.
You've been given accurate information. If you require more specific estimates, the engineers have already reported to you through two different channels that they will need to complete other tasks on which the FFI is dependent before they're in a position to estimate delivery schedules for the FFI itself.
That said, out of respect for both your time and my own I have to acknowledge that I've not really offered anything new here. We are going in circles. I have nothing else to offer here. If you want information from the company you may want to write the company directly.
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