I tried doing a 4 stage sugar last night...actually 2, one with table sugar and one with Turbinado. it was interesting that the Turbinado took much longer to reach the target temp at each ramp.
basics were that i used 1 LB of sugar, 1 cup of water, and 1 1/2 tsp of DAP for each. temp targets were 290, 280, 270, 260. once they hit the target temp I added 1 cup of cool water (knocked the temp below 240 after stirring)
The end products were remarkably similar despite one sugar being less refined than the other. The color is dead on for D2 syrup (used motor oil black, with a brown/red slight foam on top) taste, however still seems a bit lacking. very sweet (almost a sour/tart taste), but no dark chocolate flavor.
Don't get me wrong, these are not bad (and I've used them in my beer (resulting pending...)), but they don't seem to be a D2 clone. I'd like to try changing ratio of glucose/fructose and trying again. any other ideas to try?