Hey, bigmomma, are you looking for help with BettyR's premium scream? I'm not sure what you're saying. Have you actually made this one yet with the not/Sugar and without so much PDX? Not per the ingredient list you're posting...

I DO note that you've got about 950ml (~ 4 C) of dairystuff in that recipe with all that PDX, a full Cup!...my recipe works fine with a lot less PDX, and some glycerine, plenty scoopable. The "base" is pretty much it, what I use for vanilla ice cream (before adding all that chocolate stuff, just increase the sweetener a bit and the vanilla) and it's over a liter of dairystuff with only about max 4 Tbsp of the PDX in the 'syrup' I keep to hand and use in the recipe. You cold use that base with either the glycerine or the not/Sugar, and I'm pretty sure it would turn out happyhappy! I use this base for just about everything...