Good luck with your kitchen exploits over the weekend Colin. I used Abdul's basic gravy as that is what i had available at the time. It is a good basic gravy (i think his enhanced version is even better though) but any of the popular gravies on here will give you a good result when combined with a practiced technique which will come with time.
Alas, i have to venture into the kitchen to cook curry this weekend. Of all things a CTM has to be done and I intend to also produce a chicken patala for comparison. I will share the details of the latter as soon as I have a little time since no recipe is posted here.