I have made this on Thursday , I left if over night and ate it on Friday as I like the flavours to develop , I do a lot of this style of cooking , I discovered I no longer have a pressure cooker so I did it in a heavy casserole dish on the gas ring instead. I managed to get the shanks nice and tender in just two hours. It turned out really well, I really enjoyed it, highly recommended .
With this style of cooking I generally like to use fresh curry leaves which I believe gives it a bit extra flavour but that's up to you its just my personal preference.