Dont know if this site has been mentioned here but theres a lot of good videos on it. Well worth a look
http://www.vahrehvah.com
http://www.vahrehvah.com
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Do you not find that there is so much taste in the base that it overpowers the actual curry produced at the end. I would think a mild korma for instance would be overpowered by the base (not that I like kormas. The pc I use is 5 litres although thats a big one 4 or 4.5 litres would do the job I reckon. I will try to find the recipes you mentioned so I can give them a try. Would be good if you could provide links to them.