Hahaha. ;D Seriously, cooking the grabbi is a job that starts on the Weds ready for the weekend. And the restaurant where I worked just added it to a big pot that had been going for about a decade. If you are used to cooking with your grabbi after 2-3 hours, try extending that to 2-3 days and you will be amazed at the difference. All the harsh flavours get cooked out and you end up with something that is essence of curry - sweet, dark, complex. I don't mean cook it all night - but a big pot with a lid on is still warm when you get back in the morning and then you just put it back on to simmer again.
EDIT - some of these posts crossed. Not trying to cheek anyone.