Rob,
Sorry if I came across as a bit 'pushy' but from experience I see loads of users questioning recipes on here that they've never tried but have made up 100's of other bases (that don't work for them) and complain that the latest one isn't similar to other bases that didn't work for them - no logic! Great that you will try it exactly. To be honest my results were a bit oily but that's what Glasgow curries are like. If someone reduced the oil then it would probably change the end result. We would then have another 'expert' who's posted 1,000,000 posts but is still here looking for their perfect curry, and thinks this one isn't that good.....despite not trying it correctly.
If I have a point here it's that if you do what you've always done, you'll get what you've always got.
Sorry, I'm excited that I've found the base I was looking for, so I don't want anyone to tweak it without trying it.
Let us all know how it goes for you!
Martin