I don't know why I didn't see this thread before.
I've got a lot of experience using Ultraferm in the fermenter to ferment everything. My goal is reduce the carbohydrate content of the beer as much as possible.
I usually mash at 145F for three hours (while I'm working).
Add 12 ml Ultraferm to fermenter and final [adjusted] gravity will be .994 to 0.999. I've added Ultraferm to mash and not got the same results.
I've got a lot of recipe variations from 5 to 9%.
If I use >= 5% sugar, I can usually get the carbs down to 4-5 g / 12 oz with a 5% beer. The heavier the beer, the more the carbs creep up. My 8% IPA's are typically 6-10 g carbs.
When I use at least 15% oats, I've had people who can't tell it's a low carb beer. The oats seem to help with body, but not with foam retention. Pretty much zero foam retention.
Just this summer, I started using Clearzyme to break up the gluten molecules. Trying to get gluten out of my diet.