slightly off from the OPs post but a related question.

I am doing BOM-BRU-JFK on Jet J at the end of the month and checking into a Delta flight JFK-SEA shortly. Both are ticketed separately. While my 9w allowance says 69 kg for BOM-BRU as Keyser noted earlier, the BRU-JFK leg states 3 bags of 23 kgs each. On the next legs with Delta, I am eligible for 2 bags of 32 kgs each. I am planning to carry only 2 checked bags

My question is, a) will 9w be flexible in checking in bags which may be 30 kgs each approx to bring them into JFK
b) can I through check in bags all the way to SEA with 9w here itself in BOM?

TIA