Razor,
i use 300ml of base for each portion for all bases.
the recipe produced 3450ml of base and i added a further 600ml water the next day to thin it. i ended up with slightly more oil in the base (225ml) as i could not reclaim all the 500ml i added to the onion pot.
i use the same method and timings for pretty much all dishes - typ 5 mins.
on dishes i will try the basic balti next. my overall priorities to crack are sylheti, bahar and vindaloo.