No problem, it's always easier when you call than depend on me to find your PM. Emails work but even when I'm caught up on tuning and building I fall behind since I get so many each day. Most are not simple yes or no questions so I end up spending time researching or it's a lot of tech. I'm really behind now with the move going on also.
You asked what the highest possible stall would be and I said 3000. That's with the stall upgrade. There are no changes in the stator, turbine and so on with these, they remain stock to keep the cost down. So the max stall with the factory unit will be 2700 - 2800, just slightly more than all the standard 11.25 factory TCs. With the stall upgrade I have the builder change the angle of the blades slightly to give you another 300 rpm or so.
If you wanted more stall you would better off with a fully custom build or something like my 10 inch units.