This margerine thing, I'm temped to give it a try. However from a technical point of view, I not completely sure HOW it could influance the texture. Curry is served hot enough for any margerine to be completely melted, what's the difference in texture between an oil, and melted marge, not much surely?
I don't want offend anyone here, just playing devil's advocate really; but I shall give it a go!
By other concern about marge: hydrogenated oils & trans-fats! My curry-rich diet is unhealthy enough without compounding the problem.
Having said that, please keep up the good work Panpot, I certainly not criticising you or all your hard work of all all our behalves!