I was originally diagnosed T2 and on metformin (Stagid) with low-carb diet. After 2years of that, I was diagnosed LADA and now registered as T1. I've maintained max dose of Stagid (2000mg/day) ever since and it's going fine as combined with between 8-10Units of Tresiba (changed from Basaglar as is was too reactive) once I went back onto insulin. Since the T1 diagnosis my diet is much more normal.. I can eat pizza and pasta occassionally without too much trouble, and A1C1 is 6.6% (49mmol/mol)... basically works for me, although I suspect I'll eventually be increasing insulin and phasing down a bit on the metformin... by the way, I rarely take 'fast' insulin.