Well its fun and exciting to see this coming along. I know this section is a little on the quite side but that is actually a good thing when you have builds like this. Too much chatter and opinion posting can just get in the way. It will be interesting to see how it fairs against what you currently have. one of the killers on the turbo projects is getting the wrong turbo on the car. The twin scroll sounds like it allowes you to run a bigger turbo with a little less draw back
I have no idea what the exact differences are but if the new turbo is that much bigger then you would expect a little lag. but if your getting double digit boost at 3k that isnt all that bad