AVS2 compared to Street Demon?

I've tried LOTS of different jets and metering rods. Until I wised up and made the spreadsheet. I only made the spreadsheet to reduce the guessing and iterations of changing things. It's not perfect, but it and the AFR gauge are very in-sync. So, it has eliminated iterations of changes. It also clarifies to me with data, what any little change of metering rod and/or jet from where my carburetion is now, will go. In one way or the other, it would be worse if I made any changes. Meaning, my carburetion is optimized. No perfect, but optimized based on available metering rods and jets. I have also designed a metering rod that would improve my current carburetion but I haven't been able to find a company that could / would make these rods. At least, at a reasonable cost.

I did call the tech line and talked to them about this stumble. They were not helpful. As I guess this is a well documented issue with this carb, and is at least partly the reason for the annular boosters. Overall, this lean stumble is fairly minor. And is only noticeable if I'm pulling away from a stop like a granny. All other throttle inputs are very nice, crisp and linear. A whomp to the floor from a stop results in tire smoke. So, I'm not dissatisfied. Just wish I could eliminate it altogether.